./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_reverse_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/array-examples/standard_reverse_ground.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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:37:33,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:37:33,518 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:37:33,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:37:33,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:37:33,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:37:33,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:37:33,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:37:33,539 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:37:33,539 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:37:33,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:37:33,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:37:33,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:37:33,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:37:33,541 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:37:33,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:37:33,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:37:33,563 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:37:33,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:37:33,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:37:33,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:37:33,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:37:33,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:37:33,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:37:33,565 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:37:33,565 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:37:33,565 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:37:33,566 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:37:33,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:37:33,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:37:33,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:37:33,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:37:33,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:37:33,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:37:33,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:37:33,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:37:33,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:37:33,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:37:33,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:37:33,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:37:33,568 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:37:33,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:37:33,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2024-11-21 20:37:33,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:37:33,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:37:33,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:37:33,810 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:37:33,810 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:37:33,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2024-11-21 20:37:35,134 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:37:35,285 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:37:35,286 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2024-11-21 20:37:35,292 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a046bb8d5/0fb7ad6a299b4d97a9495950a95ca753/FLAG350ca5c16 [2024-11-21 20:37:35,699 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a046bb8d5/0fb7ad6a299b4d97a9495950a95ca753 [2024-11-21 20:37:35,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:37:35,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:37:35,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:37:35,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:37:35,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:37:35,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:35,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5ece30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35, skipping insertion in model container [2024-11-21 20:37:35,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:35,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:37:35,924 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-11-21 20:37:35,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:37:35,946 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:37:35,958 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-11-21 20:37:35,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:37:35,981 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:37:35,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35 WrapperNode [2024-11-21 20:37:35,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:37:35,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:37:35,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:37:35,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:37:35,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:35,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,005 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-21 20:37:36,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:37:36,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:37:36,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:37:36,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:37:36,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,021 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,050 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-21 20:37:36,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,059 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:37:36,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:37:36,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:37:36,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:37:36,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (1/1) ... [2024-11-21 20:37:36,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:37:36,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:36,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-21 20:37:36,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-21 20:37:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:37:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:37:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:37:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:37:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 20:37:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:37:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:37:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:37:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:37:36,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:37:36,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:37:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:37:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:37:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 20:37:36,229 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:37:36,230 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:37:36,322 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-21 20:37:36,323 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:37:36,333 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:37:36,333 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 20:37:36,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:37:36 BoogieIcfgContainer [2024-11-21 20:37:36,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:37:36,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:37:36,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:37:36,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:37:36,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:37:35" (1/3) ... [2024-11-21 20:37:36,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8952d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:37:36, skipping insertion in model container [2024-11-21 20:37:36,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:37:35" (2/3) ... [2024-11-21 20:37:36,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8952d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:37:36, skipping insertion in model container [2024-11-21 20:37:36,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:37:36" (3/3) ... [2024-11-21 20:37:36,343 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2024-11-21 20:37:36,360 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:37:36,361 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:37:36,404 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:37:36,409 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;@4e991bd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:37:36,409 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:37:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-21 20:37:36,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:36,416 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:36,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:36,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2024-11-21 20:37:36,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:36,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577938561] [2024-11-21 20:37:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:37:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:37:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:37:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577938561] [2024-11-21 20:37:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577938561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:37:36,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:37:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:37:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705585503] [2024-11-21 20:37:36,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:37:36,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:37:36,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:37:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:37:36,591 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:36,618 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-11-21 20:37:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:37:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-21 20:37:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:36,625 INFO L225 Difference]: With dead ends: 36 [2024-11-21 20:37:36,625 INFO L226 Difference]: Without dead ends: 18 [2024-11-21 20:37:36,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:37:36,629 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:36,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:37:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-21 20:37:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-21 20:37:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-21 20:37:36,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2024-11-21 20:37:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:36,651 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-21 20:37:36,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-21 20:37:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 20:37:36,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:36,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:36,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:37:36,652 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:36,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2024-11-21 20:37:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869683611] [2024-11-21 20:37:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:37:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:37:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:37:36,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869683611] [2024-11-21 20:37:36,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869683611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751682427] [2024-11-21 20:37:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:37:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:36,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:36,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:36,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 20:37:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:37:36,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-21 20:37:36,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:37:36,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:37:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751682427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:36,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:36,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-21 20:37:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189077388] [2024-11-21 20:37:36,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:36,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 20:37:36,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 20:37:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:37:36,879 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:36,921 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-21 20:37:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 20:37:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 20:37:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:36,924 INFO L225 Difference]: With dead ends: 39 [2024-11-21 20:37:36,924 INFO L226 Difference]: Without dead ends: 28 [2024-11-21 20:37:36,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:37:36,925 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:36,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:37:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-21 20:37:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-21 20:37:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-21 20:37:36,931 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2024-11-21 20:37:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:36,932 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-21 20:37:36,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-21 20:37:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-21 20:37:36,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:36,932 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:36,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-21 20:37:37,136 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 [2024-11-21 20:37:37,137 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:37,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 2 times [2024-11-21 20:37:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:37,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493415736] [2024-11-21 20:37:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:37:37,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:37,174 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:37:37,175 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:37:37,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493415736] [2024-11-21 20:37:37,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493415736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273837427] [2024-11-21 20:37:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:37:37,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:37,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:37,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 20:37:37,381 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:37:37,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:37,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 20:37:37,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:37:37,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:37:37,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273837427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:37,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:37,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-21 20:37:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528289287] [2024-11-21 20:37:37,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:37,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-21 20:37:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-21 20:37:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:37:37,480 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:37,548 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-11-21 20:37:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-21 20:37:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-21 20:37:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:37,549 INFO L225 Difference]: With dead ends: 69 [2024-11-21 20:37:37,549 INFO L226 Difference]: Without dead ends: 52 [2024-11-21 20:37:37,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:37:37,550 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:37,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:37:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-21 20:37:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-21 20:37:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-21 20:37:37,555 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 25 [2024-11-21 20:37:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:37,556 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-21 20:37:37,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-21 20:37:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:37:37,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:37,557 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:37,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 20:37:37,757 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 [2024-11-21 20:37:37,758 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:37,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 3 times [2024-11-21 20:37:37,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:37,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167125559] [2024-11-21 20:37:37,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:37:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:37,789 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-21 20:37:37,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-21 20:37:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:38,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167125559] [2024-11-21 20:37:38,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167125559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:37:38,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:37:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-21 20:37:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54405020] [2024-11-21 20:37:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:37:38,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-21 20:37:38,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-21 20:37:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-21 20:37:38,036 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:38,085 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-11-21 20:37:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 20:37:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-21 20:37:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:38,086 INFO L225 Difference]: With dead ends: 58 [2024-11-21 20:37:38,086 INFO L226 Difference]: Without dead ends: 56 [2024-11-21 20:37:38,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-21 20:37:38,087 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:38,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:37:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-21 20:37:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-11-21 20:37:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-11-21 20:37:38,094 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2024-11-21 20:37:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:38,094 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-11-21 20:37:38,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-11-21 20:37:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-21 20:37:38,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:38,095 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:38,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-21 20:37:38,096 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:38,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1048670371, now seen corresponding path program 1 times [2024-11-21 20:37:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947741262] [2024-11-21 20:37:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:37:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:37:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-21 20:37:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947741262] [2024-11-21 20:37:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947741262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664694746] [2024-11-21 20:37:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:37:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:38,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:38,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 20:37:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:37:38,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-21 20:37:38,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-21 20:37:38,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-21 20:37:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664694746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:38,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-21 20:37:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560928646] [2024-11-21 20:37:38,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:38,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-21 20:37:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-21 20:37:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-21 20:37:38,661 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:38,807 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2024-11-21 20:37:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-21 20:37:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-21 20:37:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:38,811 INFO L225 Difference]: With dead ends: 133 [2024-11-21 20:37:38,811 INFO L226 Difference]: Without dead ends: 102 [2024-11-21 20:37:38,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-21 20:37:38,812 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:38,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 28 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:37:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-21 20:37:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-21 20:37:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2024-11-21 20:37:38,828 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 53 [2024-11-21 20:37:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:38,830 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2024-11-21 20:37:38,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2024-11-21 20:37:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-21 20:37:38,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:38,832 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:38,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-21 20:37:39,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:39,033 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:39,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -109773453, now seen corresponding path program 2 times [2024-11-21 20:37:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622715937] [2024-11-21 20:37:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:37:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:39,086 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:37:39,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-21 20:37:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622715937] [2024-11-21 20:37:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622715937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:39,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294311049] [2024-11-21 20:37:39,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:37:39,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:39,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:39,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:39,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 20:37:39,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:37:39,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:39,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-21 20:37:39,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-21 20:37:39,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-21 20:37:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294311049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-21 20:37:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965145827] [2024-11-21 20:37:40,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:40,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-21 20:37:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-21 20:37:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:37:40,615 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:40,972 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2024-11-21 20:37:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-21 20:37:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-21 20:37:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:40,974 INFO L225 Difference]: With dead ends: 253 [2024-11-21 20:37:40,974 INFO L226 Difference]: Without dead ends: 198 [2024-11-21 20:37:40,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:37:40,975 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:40,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 28 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:37:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-21 20:37:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-21 20:37:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-11-21 20:37:40,989 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 101 [2024-11-21 20:37:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:40,989 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-11-21 20:37:40,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-11-21 20:37:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-21 20:37:40,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:40,991 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:40,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 20:37:41,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:41,192 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:41,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -645892333, now seen corresponding path program 3 times [2024-11-21 20:37:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139439105] [2024-11-21 20:37:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:37:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:41,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:37:41,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 174 proven. 95 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2024-11-21 20:37:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139439105] [2024-11-21 20:37:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139439105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925745746] [2024-11-21 20:37:41,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:37:41,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:41,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:41,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 20:37:41,731 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:37:41,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:41,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-21 20:37:41,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:42,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-21 20:37:42,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2024-11-21 20:37:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 179 proven. 3 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2024-11-21 20:37:42,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2024-11-21 20:37:42,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925745746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:42,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 26 [2024-11-21 20:37:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251346901] [2024-11-21 20:37:42,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:42,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 20:37:42,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:42,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 20:37:42,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2024-11-21 20:37:42,591 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:42,870 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2024-11-21 20:37:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-21 20:37:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2024-11-21 20:37:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:42,874 INFO L225 Difference]: With dead ends: 206 [2024-11-21 20:37:42,874 INFO L226 Difference]: Without dead ends: 204 [2024-11-21 20:37:42,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2024-11-21 20:37:42,875 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:42,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 70 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:37:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-21 20:37:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2024-11-21 20:37:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0149253731343284) internal successors, (204), 201 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2024-11-21 20:37:42,897 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2024-11-21 20:37:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:42,897 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2024-11-21 20:37:42,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2024-11-21 20:37:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-21 20:37:42,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:42,899 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:42,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-21 20:37:43,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:43,104 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:43,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1335970679, now seen corresponding path program 4 times [2024-11-21 20:37:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:43,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5326899] [2024-11-21 20:37:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:37:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:43,157 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:37:43,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2124 trivial. 0 not checked. [2024-11-21 20:37:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5326899] [2024-11-21 20:37:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5326899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374647763] [2024-11-21 20:37:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:37:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:45,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:45,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 20:37:45,225 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:37:45,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:45,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-21 20:37:45,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:37:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2124 trivial. 0 not checked. [2024-11-21 20:37:45,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:37:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2124 trivial. 0 not checked. [2024-11-21 20:37:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374647763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:37:47,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:37:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-11-21 20:37:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433950472] [2024-11-21 20:37:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:37:47,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-21 20:37:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:37:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-21 20:37:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-11-21 20:37:47,677 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:37:48,686 INFO L93 Difference]: Finished difference Result 501 states and 600 transitions. [2024-11-21 20:37:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-21 20:37:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2024-11-21 20:37:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:37:48,688 INFO L225 Difference]: With dead ends: 501 [2024-11-21 20:37:48,690 INFO L226 Difference]: Without dead ends: 394 [2024-11-21 20:37:48,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-11-21 20:37:48,694 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 489 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 20:37:48,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 36 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 20:37:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-21 20:37:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2024-11-21 20:37:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.0076335877862594) internal successors, (396), 393 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 396 transitions. [2024-11-21 20:37:48,725 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 396 transitions. Word has length 201 [2024-11-21 20:37:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:37:48,726 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 396 transitions. [2024-11-21 20:37:48,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:37:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 396 transitions. [2024-11-21 20:37:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2024-11-21 20:37:48,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:37:48,730 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:37:48,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-21 20:37:48,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:48,931 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:37:48,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:37:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1944352823, now seen corresponding path program 5 times [2024-11-21 20:37:48,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:37:48,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314774828] [2024-11-21 20:37:48,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:37:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:37:50,737 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2024-11-21 20:37:50,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:37:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2024-11-21 20:37:56,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:37:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314774828] [2024-11-21 20:37:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314774828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:37:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813285845] [2024-11-21 20:37:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:37:56,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:37:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:37:56,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 20:37:56,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process