./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/divbin2.i --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/divbin2.i -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 c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:41:36,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:41:36,391 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:41:36,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:41:36,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:41:36,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:41:36,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:41:36,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:41:36,450 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:41:36,450 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:41:36,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:41:36,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:41:36,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:41:36,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:41:36,452 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:41:36,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:41:36,452 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:41:36,452 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:41:36,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:41:36,453 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:41:36,453 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:41:36,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:41:36,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:41:36,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:41:36,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:41:36,462 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:41:36,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:41:36,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:41:36,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:41:36,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:41:36,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:41:36,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:41:36,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:41:36,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:41:36,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:41:36,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:41:36,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:41:36,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e [2024-10-12 18:41:36,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:41:36,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:41:36,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:41:36,826 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:41:36,827 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:41:36,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin2.i [2024-10-12 18:41:38,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:41:38,225 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:41:38,225 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin2.i [2024-10-12 18:41:38,232 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d118c1129/a8f7832e625f4603b80d4b542175a954/FLAG7bf84473c [2024-10-12 18:41:38,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d118c1129/a8f7832e625f4603b80d4b542175a954 [2024-10-12 18:41:38,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:41:38,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:41:38,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:41:38,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:41:38,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:41:38,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cd09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38, skipping insertion in model container [2024-10-12 18:41:38,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,286 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:41:38,467 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/divbin2.i[951,964] [2024-10-12 18:41:38,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:41:38,487 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:41:38,497 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/divbin2.i[951,964] [2024-10-12 18:41:38,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:41:38,513 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:41:38,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38 WrapperNode [2024-10-12 18:41:38,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:41:38,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:41:38,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:41:38,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:41:38,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,538 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-10-12 18:41:38,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:41:38,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:41:38,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:41:38,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:41:38,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,552 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,565 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 18:41:38,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:41:38,584 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:41:38,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:41:38,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:41:38,585 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (1/1) ... [2024-10-12 18:41:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:41:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:38,619 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 18:41:38,623 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 18:41:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:41:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:41:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:41:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:41:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 18:41:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 18:41:38,716 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:41:38,718 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:41:38,808 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-12 18:41:38,810 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:41:38,833 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:41:38,834 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 18:41:38,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:41:38 BoogieIcfgContainer [2024-10-12 18:41:38,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:41:38,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:41:38,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:41:38,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:41:38,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:41:38" (1/3) ... [2024-10-12 18:41:38,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e00c270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:41:38, skipping insertion in model container [2024-10-12 18:41:38,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:41:38" (2/3) ... [2024-10-12 18:41:38,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e00c270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:41:38, skipping insertion in model container [2024-10-12 18:41:38,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:41:38" (3/3) ... [2024-10-12 18:41:38,843 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2.i [2024-10-12 18:41:38,863 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:41:38,864 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:41:38,910 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:41:38,916 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;@4242438c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:41:38,916 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:41:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-12 18:41:38,924 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:38,924 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:38,925 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:38,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1046218469, now seen corresponding path program 1 times [2024-10-12 18:41:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:38,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247428566] [2024-10-12 18:41:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:41:39,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:39,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247428566] [2024-10-12 18:41:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247428566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:39,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:41:39,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387744584] [2024-10-12 18:41:39,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:39,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:41:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:41:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:41:39,081 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:41:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:39,104 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2024-10-12 18:41:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:41:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-12 18:41:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:39,112 INFO L225 Difference]: With dead ends: 29 [2024-10-12 18:41:39,112 INFO L226 Difference]: Without dead ends: 14 [2024-10-12 18:41:39,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 18:41:39,119 INFO L432 NwaCegarLoop]: 17 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, 17 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 18:41:39,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-12 18:41:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-12 18:41:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 18:41:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-10-12 18:41:39,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2024-10-12 18:41:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:39,148 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-10-12 18:41:39,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:41:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-10-12 18:41:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 18:41:39,150 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:39,150 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:39,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:41:39,150 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:39,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -336588208, now seen corresponding path program 1 times [2024-10-12 18:41:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588701587] [2024-10-12 18:41:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963284664] [2024-10-12 18:41:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:39,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:39,192 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 18:41:39,201 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 18:41:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:39,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:41:39,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:41:39,354 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 18:41:39,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588701587] [2024-10-12 18:41:39,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:39,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963284664] [2024-10-12 18:41:39,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963284664] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:39,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:39,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:41:39,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152706241] [2024-10-12 18:41:39,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:39,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:41:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:41:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:41:39,358 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:41:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:39,418 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-12 18:41:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 18:41:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 18:41:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:39,419 INFO L225 Difference]: With dead ends: 25 [2024-10-12 18:41:39,419 INFO L226 Difference]: Without dead ends: 22 [2024-10-12 18:41:39,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 18:41:39,421 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:39,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-12 18:41:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-12 18:41:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-12 18:41:39,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2024-10-12 18:41:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:39,427 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-12 18:41:39,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:41:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-12 18:41:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 18:41:39,428 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:39,428 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:39,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 18:41:39,632 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 18:41:39,633 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:39,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:39,634 INFO L85 PathProgramCache]: Analyzing trace with hash 895535107, now seen corresponding path program 1 times [2024-10-12 18:41:39,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:39,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320178558] [2024-10-12 18:41:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:39,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 18:41:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:41:39,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320178558] [2024-10-12 18:41:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320178558] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:41:39,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:41:39,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:41:39,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029032922] [2024-10-12 18:41:39,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:41:39,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:41:39,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:39,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:41:39,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:41:39,832 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 18:41:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:39,846 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2024-10-12 18:41:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:41:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-12 18:41:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:39,847 INFO L225 Difference]: With dead ends: 46 [2024-10-12 18:41:39,847 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 18:41:39,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:41:39,848 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:39,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:41:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 18:41:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-12 18:41:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 18:41:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-12 18:41:39,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-10-12 18:41:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:39,853 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-12 18:41:39,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 18:41:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-12 18:41:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 18:41:39,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:39,854 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:41:39,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 18:41:39,854 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:39,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash 46973886, now seen corresponding path program 1 times [2024-10-12 18:41:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:39,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2280218] [2024-10-12 18:41:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:39,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:39,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929511623] [2024-10-12 18:41:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:39,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:39,881 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 18:41:39,883 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 18:41:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:39,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 18:41:39,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 18:41:40,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:51,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2280218] [2024-10-12 18:41:51,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 18:41:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929511623] [2024-10-12 18:41:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929511623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:51,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 18:41:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-12 18:41:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876762800] [2024-10-12 18:41:51,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:51,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 18:41:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 18:41:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2024-10-12 18:41:51,395 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 18:41:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:51,483 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-10-12 18:41:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 18:41:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-10-12 18:41:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:51,486 INFO L225 Difference]: With dead ends: 34 [2024-10-12 18:41:51,486 INFO L226 Difference]: Without dead ends: 31 [2024-10-12 18:41:51,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2024-10-12 18:41:51,488 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:51,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:41:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-12 18:41:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-12 18:41:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:41:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-12 18:41:51,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 18 [2024-10-12 18:41:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:51,496 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-12 18:41:51,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 18:41:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-12 18:41:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:41:51,497 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:51,497 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-12 18:41:51,506 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 18:41:51,697 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 [2024-10-12 18:41:51,699 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:51,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1234949263, now seen corresponding path program 2 times [2024-10-12 18:41:51,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:51,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451779985] [2024-10-12 18:41:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:51,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:52,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 18:41:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:52,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 18:41:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:41:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:52,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:41:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451779985] [2024-10-12 18:41:52,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451779985] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:41:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520764781] [2024-10-12 18:41:52,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:41:52,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:52,228 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 18:41:52,231 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 18:41:52,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:41:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:41:52,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 18:41:52,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:41:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:52,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:41:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 18:41:52,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520764781] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:41:52,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:41:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2024-10-12 18:41:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100596183] [2024-10-12 18:41:52,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:41:52,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 18:41:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:41:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 18:41:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-12 18:41:52,656 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:41:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:41:52,877 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-10-12 18:41:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:41:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2024-10-12 18:41:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:41:52,878 INFO L225 Difference]: With dead ends: 69 [2024-10-12 18:41:52,878 INFO L226 Difference]: Without dead ends: 36 [2024-10-12 18:41:52,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-12 18:41:52,882 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:41:52,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:41:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-12 18:41:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-10-12 18:41:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 18:41:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-10-12 18:41:52,888 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2024-10-12 18:41:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:41:52,888 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-10-12 18:41:52,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 18:41:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-10-12 18:41:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:41:52,889 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:41:52,889 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-12 18:41:52,904 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 18:41:53,093 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 [2024-10-12 18:41:53,094 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:41:53,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:41:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash -127862420, now seen corresponding path program 3 times [2024-10-12 18:41:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:41:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608079536] [2024-10-12 18:41:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:41:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:41:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 18:41:53,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858653320] [2024-10-12 18:41:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:41:53,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:41:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:41:53,126 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 18:41:53,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process