./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/ps5-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/ps5-ll_valuebound20.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 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:09:27,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:09:27,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:09:27,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:09:27,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:09:27,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:09:27,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:09:27,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:09:27,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:09:27,547 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:09:27,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:09:27,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:09:27,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:09:27,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:09:27,549 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:09:27,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:09:27,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:09:27,552 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:09:27,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:09:27,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:09:27,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:09:27,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:09:27,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:09:27,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:09:27,554 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:09:27,554 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:09:27,555 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:09:27,555 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:09:27,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:09:27,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:09:27,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:09:27,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:09:27,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:09:27,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:09:27,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:09:27,557 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:09:27,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:09:27,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:09:27,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:09:27,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:09:27,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:09:27,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:09:27,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 [2024-10-12 19:09:27,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:09:27,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:09:27,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:09:27,761 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:09:27,762 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:09:27,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2024-10-12 19:09:28,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:09:29,160 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:09:29,161 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2024-10-12 19:09:29,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a3f288/cadd9501ab5e4b6f885ae8ba3a22760b/FLAGd96774583 [2024-10-12 19:09:29,583 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a3f288/cadd9501ab5e4b6f885ae8ba3a22760b [2024-10-12 19:09:29,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:09:29,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:09:29,593 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:09:29,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:09:29,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:09:29,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7af0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29, skipping insertion in model container [2024-10-12 19:09:29,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,614 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:09:29,789 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/ps5-ll_valuebound20.c[458,471] [2024-10-12 19:09:29,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:09:29,819 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:09:29,833 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/ps5-ll_valuebound20.c[458,471] [2024-10-12 19:09:29,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:09:29,881 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:09:29,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29 WrapperNode [2024-10-12 19:09:29,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:09:29,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:09:29,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:09:29,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:09:29,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,926 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2024-10-12 19:09:29,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:09:29,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:09:29,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:09:29,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:09:29,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,944 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]. [2024-10-12 19:09:29,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:09:29,952 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:09:29,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:09:29,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:09:29,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (1/1) ... [2024-10-12 19:09:29,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:09:29,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:29,986 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) [2024-10-12 19:09:29,993 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 [2024-10-12 19:09:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:09:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 19:09:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 19:09:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:09:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:09:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:09:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 19:09:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 19:09:30,071 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:09:30,072 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:09:30,146 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 19:09:30,146 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:09:30,163 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:09:30,164 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-12 19:09:30,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:09:30 BoogieIcfgContainer [2024-10-12 19:09:30,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:09:30,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:09:30,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:09:30,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:09:30,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:09:29" (1/3) ... [2024-10-12 19:09:30,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d24f53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:09:30, skipping insertion in model container [2024-10-12 19:09:30,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:29" (2/3) ... [2024-10-12 19:09:30,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d24f53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:09:30, skipping insertion in model container [2024-10-12 19:09:30,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:09:30" (3/3) ... [2024-10-12 19:09:30,170 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.c [2024-10-12 19:09:30,181 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:09:30,182 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:09:30,222 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:09:30,227 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;@7b673338, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:09:30,228 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:09:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 19:09:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 19:09:30,236 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:30,236 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:30,236 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:30,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2024-10-12 19:09:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587956261] [2024-10-12 19:09:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:30,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:30,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:09:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:30,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 19:09:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:09:30,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:09:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587956261] [2024-10-12 19:09:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587956261] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:09:30,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:09:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 19:09:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320276985] [2024-10-12 19:09:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:09:30,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 19:09:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:09:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 19:09:30,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 19:09:30,413 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-12 19:09:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:09:30,434 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-10-12 19:09:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 19:09:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17 [2024-10-12 19:09:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:09:30,441 INFO L225 Difference]: With dead ends: 40 [2024-10-12 19:09:30,442 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 19:09:30,444 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 [2024-10-12 19:09:30,448 INFO L432 NwaCegarLoop]: 22 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, 22 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 [2024-10-12 19:09:30,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:09:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 19:09:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-12 19:09:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:09:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-12 19:09:30,476 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2024-10-12 19:09:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:09:30,477 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-12 19:09:30,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-12 19:09:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-12 19:09:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 19:09:30,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:30,479 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:30,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:09:30,479 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:30,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2024-10-12 19:09:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023882196] [2024-10-12 19:09:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:09:30,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001024121] [2024-10-12 19:09:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:30,516 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) [2024-10-12 19:09:30,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:09:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:30,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 19:09:30,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:09:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:09:30,656 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:09:30,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:09:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023882196] [2024-10-12 19:09:30,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:09:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001024121] [2024-10-12 19:09:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001024121] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:09:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:09:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:09:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382853965] [2024-10-12 19:09:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:09:30,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:09:30,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:09:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:09:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:09:30,660 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-12 19:09:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:09:30,698 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-10-12 19:09:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:09:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 17 [2024-10-12 19:09:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:09:30,699 INFO L225 Difference]: With dead ends: 30 [2024-10-12 19:09:30,700 INFO L226 Difference]: Without dead ends: 26 [2024-10-12 19:09:30,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:09:30,701 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:09:30,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:09:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-12 19:09:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-12 19:09:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 19:09:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-12 19:09:30,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-10-12 19:09:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:09:30,707 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-12 19:09:30,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-12 19:09:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-12 19:09:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 19:09:30,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:30,708 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:30,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 19:09:30,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:30,910 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:30,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2024-10-12 19:09:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:30,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247671104] [2024-10-12 19:09:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:09:30,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703727532] [2024-10-12 19:09:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:30,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:30,967 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) [2024-10-12 19:09:30,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:09:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:31,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 19:09:31,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:09:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:09:31,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:09:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 19:09:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:09:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247671104] [2024-10-12 19:09:31,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:09:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703727532] [2024-10-12 19:09:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703727532] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:09:31,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:09:31,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-12 19:09:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033169734] [2024-10-12 19:09:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:09:31,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:09:31,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:09:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:09:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 19:09:31,180 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:09:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:09:31,224 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-10-12 19:09:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:09:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-12 19:09:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:09:31,226 INFO L225 Difference]: With dead ends: 32 [2024-10-12 19:09:31,226 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 19:09:31,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:09:31,227 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:09:31,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:09:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 19:09:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-12 19:09:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 19:09:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-12 19:09:31,238 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2024-10-12 19:09:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:09:31,238 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-12 19:09:31,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:09:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-12 19:09:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 19:09:31,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:31,241 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:31,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 19:09:31,442 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,SelfDestructingSolverStorable2 [2024-10-12 19:09:31,443 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:31,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2024-10-12 19:09:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088826453] [2024-10-12 19:09:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:09:31,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895934796] [2024-10-12 19:09:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:31,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:31,502 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) [2024-10-12 19:09:31,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 19:09:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:09:31,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 19:09:31,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:09:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 19:09:31,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:09:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 19:09:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:09:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088826453] [2024-10-12 19:09:31,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:09:31,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895934796] [2024-10-12 19:09:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895934796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:09:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:09:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-12 19:09:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851121545] [2024-10-12 19:09:31,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:09:31,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 19:09:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:09:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 19:09:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:09:31,778 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-12 19:09:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:09:31,882 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-10-12 19:09:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 19:09:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-12 19:09:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:09:31,883 INFO L225 Difference]: With dead ends: 45 [2024-10-12 19:09:31,883 INFO L226 Difference]: Without dead ends: 37 [2024-10-12 19:09:31,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-12 19:09:31,884 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:09:31,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 131 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:09:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-12 19:09:31,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-12 19:09:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 19:09:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-10-12 19:09:31,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2024-10-12 19:09:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:09:31,897 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-10-12 19:09:31,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-12 19:09:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-10-12 19:09:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-12 19:09:31,902 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:31,902 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:31,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 19:09:32,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:32,107 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:32,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times [2024-10-12 19:09:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:32,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469967612] [2024-10-12 19:09:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:09:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743991010] [2024-10-12 19:09:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:09:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:32,157 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) [2024-10-12 19:09:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 19:09:32,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:09:32,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:09:32,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 19:09:32,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:09:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-12 19:09:32,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:09:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-12 19:09:32,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:09:32,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469967612] [2024-10-12 19:09:32,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:09:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743991010] [2024-10-12 19:09:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743991010] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:09:32,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:09:32,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-12 19:09:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595469771] [2024-10-12 19:09:32,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:09:32,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 19:09:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:09:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 19:09:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:09:32,615 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2024-10-12 19:09:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:09:32,983 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-10-12 19:09:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 19:09:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) Word has length 56 [2024-10-12 19:09:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:09:32,985 INFO L225 Difference]: With dead ends: 62 [2024-10-12 19:09:32,985 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 19:09:32,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-10-12 19:09:32,986 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:09:32,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 305 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:09:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 19:09:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-10-12 19:09:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-12 19:09:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-10-12 19:09:33,003 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 56 [2024-10-12 19:09:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:09:33,004 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-10-12 19:09:33,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2024-10-12 19:09:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-10-12 19:09:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-12 19:09:33,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:09:33,005 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:09:33,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:09:33,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:33,206 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:09:33,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:09:33,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1077833742, now seen corresponding path program 3 times [2024-10-12 19:09:33,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:09:33,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864966509] [2024-10-12 19:09:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:09:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:09:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:09:33,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203036361] [2024-10-12 19:09:33,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 19:09:33,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:09:33,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:09:33,312 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) [2024-10-12 19:09:33,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:09:33,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-12 19:09:33,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:09:33,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-12 19:09:33,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:09:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 45 proven. 142 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-10-12 19:09:33,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:09:41,983 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2024-10-12 19:09:55,131 WARN L286 SmtUtils]: Spent 9.07s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 19:10:11,160 WARN L286 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 19:10:15,166 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10)) 30) 0) (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|)))))) is different from true [2024-10-12 19:10:31,711 WARN L286 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 19:10:47,739 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 19:10:51,747 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| 10)) 30) 0) (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_26|)) (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2024-10-12 19:11:03,796 WARN L851 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2024-10-12 19:11:19,929 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 3) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 3))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false