./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.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 fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:13:25,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:13:25,251 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:13:25,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:13:25,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:13:25,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:13:25,276 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:13:25,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:13:25,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:13:25,278 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:13:25,278 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:13:25,278 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:13:25,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:13:25,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:13:25,279 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:13:25,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:13:25,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:13:25,296 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:13:25,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:13:25,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:13:25,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:13:25,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:13:25,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:13:25,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:13:25,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:13:25,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:13:25,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:13:25,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:13:25,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:13:25,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:13:25,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:13:25,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:13:25,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:13:25,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:13:25,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:13:25,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:13:25,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:13:25,506 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:13:25,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2023-11-22 18:13:26,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:13:26,704 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:13:26,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2023-11-22 18:13:26,710 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/865b7d1f2/07294eb310a540e2a44d69146e8b2ced/FLAG344242c8f [2023-11-22 18:13:26,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/865b7d1f2/07294eb310a540e2a44d69146e8b2ced [2023-11-22 18:13:26,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:13:26,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:13:26,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:13:26,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:13:26,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:13:26,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1222a8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26, skipping insertion in model container [2023-11-22 18:13:26,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,760 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:13:26,854 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i[814,827] [2023-11-22 18:13:26,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:13:26,869 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:13:26,878 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i[814,827] [2023-11-22 18:13:26,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:13:26,891 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:13:26,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26 WrapperNode [2023-11-22 18:13:26,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:13:26,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:13:26,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:13:26,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:13:26,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,915 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-11-22 18:13:26,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:13:26,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:13:26,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:13:26,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:13:26,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,924 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,930 INFO L189 HeapSplitter]: Split 5 memory accesses to 2 slices as follows [2, 3] [2023-11-22 18:13:26,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:13:26,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:13:26,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:13:26,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:13:26,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (1/1) ... [2023-11-22 18:13:26,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:13:26,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:26,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:13:26,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:13:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:13:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:13:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:13:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:13:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:13:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:13:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:13:27,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:13:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:13:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:13:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:13:27,096 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:13:27,097 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:13:27,187 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:13:27,204 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:13:27,205 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 18:13:27,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:13:27 BoogieIcfgContainer [2023-11-22 18:13:27,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:13:27,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:13:27,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:13:27,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:13:27,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:13:26" (1/3) ... [2023-11-22 18:13:27,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e47d393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:13:27, skipping insertion in model container [2023-11-22 18:13:27,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:13:26" (2/3) ... [2023-11-22 18:13:27,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e47d393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:13:27, skipping insertion in model container [2023-11-22 18:13:27,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:13:27" (3/3) ... [2023-11-22 18:13:27,212 INFO L112 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2023-11-22 18:13:27,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:13:27,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:13:27,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:13:27,258 INFO L357 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, mHoare=true, 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;@4a26c557, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:13:27,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:13:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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) [2023-11-22 18:13:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 18:13:27,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:27,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 18:13:27,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:27,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1968117311, now seen corresponding path program 1 times [2023-11-22 18:13:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368896175] [2023-11-22 18:13:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:27,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368896175] [2023-11-22 18:13:27,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368896175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:13:27,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:13:27,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:13:27,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645828146] [2023-11-22 18:13:27,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:13:27,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:13:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:13:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:13:27,488 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-22 18:13:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:27,517 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2023-11-22 18:13:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:13:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-22 18:13:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:27,528 INFO L225 Difference]: With dead ends: 30 [2023-11-22 18:13:27,528 INFO L226 Difference]: Without dead ends: 18 [2023-11-22 18:13:27,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:13:27,534 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:27,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:13:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-22 18:13:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2023-11-22 18:13:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2023-11-22 18:13:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-22 18:13:27,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2023-11-22 18:13:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:27,557 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-22 18:13:27,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-22 18:13:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-22 18:13:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-22 18:13:27,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:27,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:13:27,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:27,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash 369958735, now seen corresponding path program 1 times [2023-11-22 18:13:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:27,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468523569] [2023-11-22 18:13:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468523569] [2023-11-22 18:13:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468523569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084304970] [2023-11-22 18:13:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:27,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:27,698 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) [2023-11-22 18:13:27,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:13:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:27,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 18:13:27,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:27,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084304970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:13:27,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:13:27,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-22 18:13:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371907129] [2023-11-22 18:13:27,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:13:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:13:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:13:27,829 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-11-22 18:13:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:27,890 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2023-11-22 18:13:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:13:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 7 [2023-11-22 18:13:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:27,891 INFO L225 Difference]: With dead ends: 48 [2023-11-22 18:13:27,892 INFO L226 Difference]: Without dead ends: 36 [2023-11-22 18:13:27,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:13:27,893 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:27,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:13:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-22 18:13:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2023-11-22 18:13:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-11-22 18:13:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-22 18:13:27,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2023-11-22 18:13:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:27,901 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-22 18:13:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-11-22 18:13:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-22 18:13:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 18:13:27,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:27,903 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:27,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:13:28,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:28,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:28,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1697063615, now seen corresponding path program 2 times [2023-11-22 18:13:28,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:28,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515398624] [2023-11-22 18:13:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:28,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:28,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515398624] [2023-11-22 18:13:28,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515398624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:28,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597577620] [2023-11-22 18:13:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:13:28,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:28,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:28,239 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) [2023-11-22 18:13:28,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:13:28,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:13:28,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:13:28,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 18:13:28,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:28,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:28,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597577620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:13:28,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:13:28,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-22 18:13:28,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655417799] [2023-11-22 18:13:28,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:28,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 18:13:28,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:28,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 18:13:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:13:28,345 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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) [2023-11-22 18:13:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:28,428 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2023-11-22 18:13:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:13:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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) Word has length 10 [2023-11-22 18:13:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:28,430 INFO L225 Difference]: With dead ends: 101 [2023-11-22 18:13:28,431 INFO L226 Difference]: Without dead ends: 84 [2023-11-22 18:13:28,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:13:28,432 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 133 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 46 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:13:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-22 18:13:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2023-11-22 18:13:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 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) [2023-11-22 18:13:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-22 18:13:28,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 10 [2023-11-22 18:13:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:28,439 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-22 18:13:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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) [2023-11-22 18:13:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-22 18:13:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:13:28,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:28,440 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:28,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-22 18:13:28,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 18:13:28,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:28,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1334574463, now seen corresponding path program 3 times [2023-11-22 18:13:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:28,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461444169] [2023-11-22 18:13:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461444169] [2023-11-22 18:13:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461444169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638850693] [2023-11-22 18:13:28,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:13:28,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:28,882 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) [2023-11-22 18:13:28,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:13:28,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-22 18:13:28,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:13:28,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:13:28,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:28,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:29,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638850693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:13:29,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:13:29,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-22 18:13:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910726545] [2023-11-22 18:13:29,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:29,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:13:29,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:13:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:13:29,115 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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) [2023-11-22 18:13:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:29,242 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2023-11-22 18:13:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 18:13:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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) Word has length 16 [2023-11-22 18:13:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:29,243 INFO L225 Difference]: With dead ends: 212 [2023-11-22 18:13:29,243 INFO L226 Difference]: Without dead ends: 180 [2023-11-22 18:13:29,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:13:29,245 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 321 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:29,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 94 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:13:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-22 18:13:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 86. [2023-11-22 18:13:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 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) [2023-11-22 18:13:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2023-11-22 18:13:29,252 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 16 [2023-11-22 18:13:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:29,252 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2023-11-22 18:13:29,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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) [2023-11-22 18:13:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2023-11-22 18:13:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 18:13:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:29,253 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:29,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:13:29,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:29,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:29,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2075884801, now seen corresponding path program 4 times [2023-11-22 18:13:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:29,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124908437] [2023-11-22 18:13:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:29,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:29,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124908437] [2023-11-22 18:13:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124908437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682394240] [2023-11-22 18:13:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:13:29,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:29,936 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) [2023-11-22 18:13:29,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:13:30,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:13:30,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:13:30,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 18:13:30,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:30,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:30,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682394240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:13:30,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:13:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-22 18:13:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661577112] [2023-11-22 18:13:30,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-22 18:13:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-22 18:13:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 18:13:30,644 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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) [2023-11-22 18:13:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:30,996 INFO L93 Difference]: Finished difference Result 434 states and 506 transitions. [2023-11-22 18:13:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-22 18:13:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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) Word has length 28 [2023-11-22 18:13:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:30,998 INFO L225 Difference]: With dead ends: 434 [2023-11-22 18:13:30,998 INFO L226 Difference]: Without dead ends: 372 [2023-11-22 18:13:30,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 18:13:30,999 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 921 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:31,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 186 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:13:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-22 18:13:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 170. [2023-11-22 18:13:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.1538461538461537) internal successors, (195), 169 states have internal predecessors, (195), 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) [2023-11-22 18:13:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 195 transitions. [2023-11-22 18:13:31,010 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 195 transitions. Word has length 28 [2023-11-22 18:13:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:31,010 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 195 transitions. [2023-11-22 18:13:31,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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) [2023-11-22 18:13:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 195 transitions. [2023-11-22 18:13:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-22 18:13:31,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:31,011 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:31,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:13:31,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:31,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:31,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:31,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1975569919, now seen corresponding path program 5 times [2023-11-22 18:13:31,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:31,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747794334] [2023-11-22 18:13:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:31,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:32,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747794334] [2023-11-22 18:13:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747794334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086790261] [2023-11-22 18:13:32,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:13:32,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:32,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:32,646 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) [2023-11-22 18:13:32,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:13:45,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-22 18:13:45,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:13:45,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-22 18:13:45,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:45,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086790261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:13:47,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:13:47,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-11-22 18:13:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124555160] [2023-11-22 18:13:47,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:47,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-22 18:13:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-22 18:13:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-22 18:13:47,291 INFO L87 Difference]: Start difference. First operand 170 states and 195 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 states have internal predecessors, (102), 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) [2023-11-22 18:13:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:49,312 INFO L93 Difference]: Finished difference Result 878 states and 1022 transitions. [2023-11-22 18:13:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-22 18:13:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 states have internal predecessors, (102), 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 52 [2023-11-22 18:13:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:49,316 INFO L225 Difference]: With dead ends: 878 [2023-11-22 18:13:49,316 INFO L226 Difference]: Without dead ends: 756 [2023-11-22 18:13:49,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-22 18:13:49,319 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2298 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:49,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 378 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:13:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-22 18:13:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 338. [2023-11-22 18:13:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.1483679525222552) internal successors, (387), 337 states have internal predecessors, (387), 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) [2023-11-22 18:13:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 387 transitions. [2023-11-22 18:13:49,332 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 387 transitions. Word has length 52 [2023-11-22 18:13:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:49,332 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 387 transitions. [2023-11-22 18:13:49,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 states have internal predecessors, (102), 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) [2023-11-22 18:13:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 387 transitions. [2023-11-22 18:13:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-22 18:13:49,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:49,334 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:49,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-22 18:13:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:49,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:49,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1285135361, now seen corresponding path program 6 times [2023-11-22 18:13:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646137524] [2023-11-22 18:13:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:13:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646137524] [2023-11-22 18:13:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646137524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26167975] [2023-11-22 18:13:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:13:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:53,400 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) [2023-11-22 18:13:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process Killed by 15