./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:02:59,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:02:59,919 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:02:59,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:02:59,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:02:59,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:02:59,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:02:59,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:02:59,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:02:59,956 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:02:59,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:02:59,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:02:59,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:02:59,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:02:59,959 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:02:59,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:02:59,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:02:59,962 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:02:59,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:02:59,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:02:59,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:02:59,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:02:59,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:02:59,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:02:59,965 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:02:59,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:02:59,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:02:59,966 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:02:59,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:02:59,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:02:59,967 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:02:59,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:02:59,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:02:59,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:02:59,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:02:59,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:02:59,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:02:59,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:02:59,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:02:59,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:02:59,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:02:59,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:02:59,971 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 [2024-10-11 02:03:00,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:03:00,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:03:00,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:03:00,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:03:00,256 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:03:00,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-10-11 02:03:01,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:03:01,887 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:03:01,888 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-10-11 02:03:01,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9d85ba94e/1bfc1114e69249849624a0feb87cb8ec/FLAGf289a5b11 [2024-10-11 02:03:01,957 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9d85ba94e/1bfc1114e69249849624a0feb87cb8ec [2024-10-11 02:03:01,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:03:01,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:03:01,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:03:01,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:03:01,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:03:01,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:03:01" (1/1) ... [2024-10-11 02:03:01,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f591c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:01, skipping insertion in model container [2024-10-11 02:03:01,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:03:01" (1/1) ... [2024-10-11 02:03:02,007 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:03:02,183 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-10-11 02:03:02,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:03:02,226 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:03:02,239 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-10-11 02:03:02,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:03:02,272 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:03:02,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02 WrapperNode [2024-10-11 02:03:02,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:03:02,274 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:03:02,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:03:02,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:03:02,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,307 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-10-11 02:03:02,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:03:02,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:03:02,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:03:02,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:03:02,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,341 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 02:03:02,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:03:02,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:03:02,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:03:02,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:03:02,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (1/1) ... [2024-10-11 02:03:02,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:03:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:02,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:03:02,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:03:02,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:03:02,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:03:02,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:03:02,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:03:02,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:03:02,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:03:02,487 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:03:02,488 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:03:02,636 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-11 02:03:02,637 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:03:02,663 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:03:02,663 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 02:03:02,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:03:02 BoogieIcfgContainer [2024-10-11 02:03:02,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:03:02,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:03:02,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:03:02,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:03:02,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:03:01" (1/3) ... [2024-10-11 02:03:02,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad1fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:03:02, skipping insertion in model container [2024-10-11 02:03:02,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:03:02" (2/3) ... [2024-10-11 02:03:02,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad1fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:03:02, skipping insertion in model container [2024-10-11 02:03:02,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:03:02" (3/3) ... [2024-10-11 02:03:02,674 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2024-10-11 02:03:02,691 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:03:02,691 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:03:02,748 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:03:02,754 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;@6304cf31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:03:02,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:03:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:03:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 02:03:02,769 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:02,769 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:02,770 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:02,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2080946738, now seen corresponding path program 1 times [2024-10-11 02:03:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:02,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410968870] [2024-10-11 02:03:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:03:02,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:02,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410968870] [2024-10-11 02:03:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410968870] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:03:02,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:03:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:03:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250382749] [2024-10-11 02:03:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:03:02,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:03:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:03:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:03:02,959 INFO L87 Difference]: Start difference. First operand has 24 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:03:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:02,996 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2024-10-11 02:03:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:03:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 02:03:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:03,003 INFO L225 Difference]: With dead ends: 46 [2024-10-11 02:03:03,003 INFO L226 Difference]: Without dead ends: 22 [2024-10-11 02:03:03,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:03:03,009 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:03,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:03:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-11 02:03:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-11 02:03:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-11 02:03:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-10-11 02:03:03,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-10-11 02:03:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:03,043 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-10-11 02:03:03,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:03:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-10-11 02:03:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 02:03:03,045 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:03,046 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:03,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:03:03,046 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:03,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -304390244, now seen corresponding path program 1 times [2024-10-11 02:03:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642554945] [2024-10-11 02:03:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:03:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:03,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642554945] [2024-10-11 02:03:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642554945] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:03:03,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:03:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:03:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004839800] [2024-10-11 02:03:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:03:03,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:03:03,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:03:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:03:03,294 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:03:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:03,437 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2024-10-11 02:03:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:03:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 02:03:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:03,439 INFO L225 Difference]: With dead ends: 28 [2024-10-11 02:03:03,439 INFO L226 Difference]: Without dead ends: 26 [2024-10-11 02:03:03,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:03:03,440 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:03,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:03:03,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-11 02:03:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-11 02:03:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-11 02:03:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-10-11 02:03:03,455 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-10-11 02:03:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:03,455 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-10-11 02:03:03,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:03:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-10-11 02:03:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 02:03:03,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:03,457 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:03,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:03:03,457 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:03,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1112146385, now seen corresponding path program 1 times [2024-10-11 02:03:03,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:03,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670379135] [2024-10-11 02:03:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:03,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718518495] [2024-10-11 02:03:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:03,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:03,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:03:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:03,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:03:03,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:03:03,721 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:03:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670379135] [2024-10-11 02:03:03,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:03,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718518495] [2024-10-11 02:03:03,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718518495] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:03:03,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:03:03,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:03:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144953389] [2024-10-11 02:03:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:03:03,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:03:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:03:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:03:03,728 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:03:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:03,812 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2024-10-11 02:03:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:03:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-11 02:03:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:03,814 INFO L225 Difference]: With dead ends: 45 [2024-10-11 02:03:03,814 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 02:03:03,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:03:03,815 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:03,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:03:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 02:03:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-10-11 02:03:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 02:03:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-11 02:03:03,837 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2024-10-11 02:03:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:03,838 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-11 02:03:03,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:03:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-11 02:03:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 02:03:03,839 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:03,840 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:03,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 02:03:04,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:04,041 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:04,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1589877564, now seen corresponding path program 1 times [2024-10-11 02:03:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156999918] [2024-10-11 02:03:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:04,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877203137] [2024-10-11 02:03:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:04,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:04,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:03:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:04,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:03:04,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:03:04,175 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:03:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156999918] [2024-10-11 02:03:04,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877203137] [2024-10-11 02:03:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877203137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:03:04,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:03:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:03:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728565580] [2024-10-11 02:03:04,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:03:04,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:03:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:03:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:03:04,178 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:03:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:04,273 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-10-11 02:03:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:03:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-11 02:03:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:04,275 INFO L225 Difference]: With dead ends: 49 [2024-10-11 02:03:04,275 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 02:03:04,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:03:04,276 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:04,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:03:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 02:03:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-10-11 02:03:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-11 02:03:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2024-10-11 02:03:04,301 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 18 [2024-10-11 02:03:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:04,301 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2024-10-11 02:03:04,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:03:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2024-10-11 02:03:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 02:03:04,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:04,303 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:04,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 02:03:04,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:04,504 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:04,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1560032783, now seen corresponding path program 1 times [2024-10-11 02:03:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970229051] [2024-10-11 02:03:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:04,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631788842] [2024-10-11 02:03:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:04,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:04,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:03:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:04,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:03:04,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:03:04,676 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:03:04,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:04,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970229051] [2024-10-11 02:03:04,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631788842] [2024-10-11 02:03:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631788842] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:03:04,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:03:04,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:03:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351936361] [2024-10-11 02:03:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:03:04,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:03:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:03:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:03:04,678 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:03:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:04,773 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-10-11 02:03:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:03:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-11 02:03:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:04,776 INFO L225 Difference]: With dead ends: 57 [2024-10-11 02:03:04,776 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 02:03:04,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:03:04,778 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:04,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:03:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 02:03:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-11 02:03:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:03:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-10-11 02:03:04,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2024-10-11 02:03:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:04,802 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-10-11 02:03:04,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:03:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-10-11 02:03:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 02:03:04,803 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:04,803 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:04,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 02:03:05,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:05,010 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:05,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1769588868, now seen corresponding path program 1 times [2024-10-11 02:03:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:05,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947503985] [2024-10-11 02:03:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:05,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826991669] [2024-10-11 02:03:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:05,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:05,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:05,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:05,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:03:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:05,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 02:03:05,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 02:03:05,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 02:03:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947503985] [2024-10-11 02:03:05,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826991669] [2024-10-11 02:03:05,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826991669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:05,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-10-11 02:03:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244290163] [2024-10-11 02:03:05,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:05,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 02:03:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 02:03:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:03:05,530 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-11 02:03:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:05,804 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2024-10-11 02:03:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 02:03:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2024-10-11 02:03:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:05,807 INFO L225 Difference]: With dead ends: 68 [2024-10-11 02:03:05,807 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 02:03:05,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:03:05,809 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:05,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:03:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 02:03:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2024-10-11 02:03:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-11 02:03:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-11 02:03:05,830 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 40 [2024-10-11 02:03:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:05,830 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-11 02:03:05,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-11 02:03:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-11 02:03:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 02:03:05,832 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:05,832 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:05,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:03:06,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 02:03:06,033 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:06,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1335110159, now seen corresponding path program 2 times [2024-10-11 02:03:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626820538] [2024-10-11 02:03:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:06,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158868658] [2024-10-11 02:03:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:03:06,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:06,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:06,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:03:06,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:03:06,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:03:06,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 02:03:06,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-11 02:03:06,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-11 02:03:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626820538] [2024-10-11 02:03:06,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158868658] [2024-10-11 02:03:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158868658] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:06,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-10-11 02:03:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737641882] [2024-10-11 02:03:06,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:06,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 02:03:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 02:03:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:03:06,452 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2024-10-11 02:03:10,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:03:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:10,747 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-10-11 02:03:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 02:03:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 45 [2024-10-11 02:03:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:10,751 INFO L225 Difference]: With dead ends: 83 [2024-10-11 02:03:10,751 INFO L226 Difference]: Without dead ends: 81 [2024-10-11 02:03:10,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-10-11 02:03:10,752 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:10,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-10-11 02:03:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-11 02:03:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-10-11 02:03:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 44 states have internal predecessors, (44), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-11 02:03:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-10-11 02:03:10,782 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 45 [2024-10-11 02:03:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:10,783 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-10-11 02:03:10,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2024-10-11 02:03:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-10-11 02:03:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-11 02:03:10,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:10,784 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:10,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 02:03:10,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:10,985 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:10,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 644018972, now seen corresponding path program 3 times [2024-10-11 02:03:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509561041] [2024-10-11 02:03:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417244956] [2024-10-11 02:03:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:03:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:11,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:11,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:03:11,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 02:03:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:03:11,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:03:11,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-11 02:03:11,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-11 02:03:11,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:11,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509561041] [2024-10-11 02:03:11,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:11,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417244956] [2024-10-11 02:03:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417244956] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:11,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:11,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-11 02:03:11,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418623573] [2024-10-11 02:03:11,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:11,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 02:03:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 02:03:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:03:11,263 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-10-11 02:03:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:11,538 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2024-10-11 02:03:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:03:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 50 [2024-10-11 02:03:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:11,540 INFO L225 Difference]: With dead ends: 95 [2024-10-11 02:03:11,541 INFO L226 Difference]: Without dead ends: 83 [2024-10-11 02:03:11,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:03:11,542 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:11,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 160 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:03:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-11 02:03:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2024-10-11 02:03:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 02:03:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-10-11 02:03:11,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 50 [2024-10-11 02:03:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:11,561 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-10-11 02:03:11,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-10-11 02:03:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-10-11 02:03:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-11 02:03:11,563 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:11,563 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:11,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:03:11,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 02:03:11,767 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:11,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash 811423347, now seen corresponding path program 1 times [2024-10-11 02:03:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:11,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728949560] [2024-10-11 02:03:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:11,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719789468] [2024-10-11 02:03:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:11,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:11,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:11,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:03:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:11,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:03:11,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:03:12,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:03:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728949560] [2024-10-11 02:03:12,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719789468] [2024-10-11 02:03:12,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719789468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:12,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:12,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-11 02:03:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125408791] [2024-10-11 02:03:12,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:12,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:03:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:03:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:03:12,353 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-10-11 02:03:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:13,001 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2024-10-11 02:03:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 02:03:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 66 [2024-10-11 02:03:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:13,004 INFO L225 Difference]: With dead ends: 114 [2024-10-11 02:03:13,004 INFO L226 Difference]: Without dead ends: 112 [2024-10-11 02:03:13,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:03:13,005 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:13,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 152 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:03:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-11 02:03:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-10-11 02:03:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-11 02:03:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2024-10-11 02:03:13,049 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 66 [2024-10-11 02:03:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:13,050 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2024-10-11 02:03:13,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-10-11 02:03:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2024-10-11 02:03:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 02:03:13,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:13,051 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:13,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 02:03:13,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:13,252 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:13,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash 462308408, now seen corresponding path program 1 times [2024-10-11 02:03:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990331835] [2024-10-11 02:03:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:13,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281559650] [2024-10-11 02:03:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:13,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:13,300 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:03:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:03:13,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 02:03:13,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-10-11 02:03:13,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-10-11 02:03:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990331835] [2024-10-11 02:03:13,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281559650] [2024-10-11 02:03:13,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281559650] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:13,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:13,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2024-10-11 02:03:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009870764] [2024-10-11 02:03:13,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:13,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 02:03:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 02:03:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:03:13,959 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-10-11 02:03:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:14,351 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2024-10-11 02:03:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:03:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 71 [2024-10-11 02:03:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:14,353 INFO L225 Difference]: With dead ends: 125 [2024-10-11 02:03:14,353 INFO L226 Difference]: Without dead ends: 109 [2024-10-11 02:03:14,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-10-11 02:03:14,354 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:14,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 177 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:03:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-11 02:03:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-10-11 02:03:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 64 states have internal predecessors, (65), 30 states have call successors, (30), 16 states have call predecessors, (30), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-10-11 02:03:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2024-10-11 02:03:14,395 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 71 [2024-10-11 02:03:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:14,396 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2024-10-11 02:03:14,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-10-11 02:03:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2024-10-11 02:03:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-11 02:03:14,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:14,401 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:14,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 02:03:14,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 02:03:14,602 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:14,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -198556648, now seen corresponding path program 2 times [2024-10-11 02:03:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295949535] [2024-10-11 02:03:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:14,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108349060] [2024-10-11 02:03:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:03:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:14,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:14,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:03:14,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:03:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:03:14,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-11 02:03:14,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-10-11 02:03:15,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-10-11 02:03:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295949535] [2024-10-11 02:03:16,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108349060] [2024-10-11 02:03:16,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108349060] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:16,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:16,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-10-11 02:03:16,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312039263] [2024-10-11 02:03:16,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:16,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 02:03:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 02:03:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-10-11 02:03:16,507 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) [2024-10-11 02:03:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:17,171 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2024-10-11 02:03:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 02:03:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) Word has length 125 [2024-10-11 02:03:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:17,173 INFO L225 Difference]: With dead ends: 131 [2024-10-11 02:03:17,173 INFO L226 Difference]: Without dead ends: 115 [2024-10-11 02:03:17,174 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2024-10-11 02:03:17,174 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:17,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 282 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:03:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-11 02:03:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-10-11 02:03:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 27 states have call successors, (27), 18 states have call predecessors, (27), 17 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-11 02:03:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2024-10-11 02:03:17,221 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 125 [2024-10-11 02:03:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:17,222 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2024-10-11 02:03:17,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 12 states have call successors, (44) [2024-10-11 02:03:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2024-10-11 02:03:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-10-11 02:03:17,224 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:03:17,224 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:03:17,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 02:03:17,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:17,429 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:03:17,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:03:17,429 INFO L85 PathProgramCache]: Analyzing trace with hash 678210342, now seen corresponding path program 2 times [2024-10-11 02:03:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:03:17,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591594317] [2024-10-11 02:03:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:03:17,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:03:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:03:17,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672924316] [2024-10-11 02:03:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:03:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:03:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:03:17,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:03:17,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:03:17,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:03:17,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:03:17,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-11 02:03:17,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:03:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 111 proven. 86 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-10-11 02:03:17,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:03:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 139 proven. 16 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2024-10-11 02:03:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:03:18,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591594317] [2024-10-11 02:03:18,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:03:18,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672924316] [2024-10-11 02:03:18,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672924316] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:03:18,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:03:18,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2024-10-11 02:03:18,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350249478] [2024-10-11 02:03:18,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:03:18,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 02:03:18,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:03:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 02:03:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-11 02:03:18,579 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 11 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 9 states have call predecessors, (37), 10 states have call successors, (37) [2024-10-11 02:03:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:03:19,037 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-10-11 02:03:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:03:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 11 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 9 states have call predecessors, (37), 10 states have call successors, (37) Word has length 147 [2024-10-11 02:03:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:03:19,038 INFO L225 Difference]: With dead ends: 135 [2024-10-11 02:03:19,038 INFO L226 Difference]: Without dead ends: 0 [2024-10-11 02:03:19,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-10-11 02:03:19,039 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:03:19,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 228 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:03:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-11 02:03:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-11 02:03:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2024-10-11 02:03:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-11 02:03:19,041 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 147 [2024-10-11 02:03:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:03:19,041 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-11 02:03:19,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 11 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 9 states have call predecessors, (37), 10 states have call successors, (37) [2024-10-11 02:03:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-11 02:03:19,041 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-11 02:03:19,044 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-11 02:03:19,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 02:03:19,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 02:03:19,252 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 02:03:19,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-11 02:03:22,518 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 02:03:22,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:03:22 BoogieIcfgContainer [2024-10-11 02:03:22,543 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 02:03:22,543 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 02:03:22,543 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 02:03:22,543 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 02:03:22,544 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:03:02" (3/4) ... [2024-10-11 02:03:22,545 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-11 02:03:22,548 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-11 02:03:22,552 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-10-11 02:03:22,552 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-10-11 02:03:22,552 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-11 02:03:22,553 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-11 02:03:22,637 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-11 02:03:22,637 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-11 02:03:22,638 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 02:03:22,639 INFO L158 Benchmark]: Toolchain (without parser) took 20666.75ms. Allocated memory was 174.1MB in the beginning and 239.1MB in the end (delta: 65.0MB). Free memory was 142.4MB in the beginning and 84.8MB in the end (delta: 57.7MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,639 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 174.1MB. Free memory is still 145.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 02:03:22,639 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.12ms. Allocated memory is still 174.1MB. Free memory was 142.4MB in the beginning and 129.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,640 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.00ms. Allocated memory is still 174.1MB. Free memory was 129.7MB in the beginning and 128.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 02:03:22,640 INFO L158 Benchmark]: Boogie Preprocessor took 47.17ms. Allocated memory is still 174.1MB. Free memory was 128.4MB in the beginning and 126.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,640 INFO L158 Benchmark]: RCFGBuilder took 306.55ms. Allocated memory is still 174.1MB. Free memory was 126.5MB in the beginning and 113.1MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,641 INFO L158 Benchmark]: TraceAbstraction took 19876.05ms. Allocated memory was 174.1MB in the beginning and 239.1MB in the end (delta: 65.0MB). Free memory was 112.5MB in the beginning and 90.0MB in the end (delta: 22.5MB). Peak memory consumption was 117.3MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,641 INFO L158 Benchmark]: Witness Printer took 94.96ms. Allocated memory is still 239.1MB. Free memory was 90.0MB in the beginning and 84.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-11 02:03:22,642 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 174.1MB. Free memory is still 145.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.12ms. Allocated memory is still 174.1MB. Free memory was 142.4MB in the beginning and 129.7MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.00ms. Allocated memory is still 174.1MB. Free memory was 129.7MB in the beginning and 128.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.17ms. Allocated memory is still 174.1MB. Free memory was 128.4MB in the beginning and 126.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.55ms. Allocated memory is still 174.1MB. Free memory was 126.5MB in the beginning and 113.1MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 19876.05ms. Allocated memory was 174.1MB in the beginning and 239.1MB in the end (delta: 65.0MB). Free memory was 112.5MB in the beginning and 90.0MB in the end (delta: 22.5MB). Peak memory consumption was 117.3MB. Max. memory is 16.1GB. * Witness Printer took 94.96ms. Allocated memory is still 239.1MB. Free memory was 90.0MB in the beginning and 84.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.5s, OverallIterations: 12, TraceHistogramMax: 27, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 84 mSDsluCounter, 1652 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1319 mSDsCounter, 280 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1523 IncrementalHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 280 mSolverCounterUnsat, 333 mSDtfsCounter, 1523 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1166 GetRequests, 1033 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=11, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 55 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 1212 NumberOfCodeBlocks, 1182 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1139 ConstructedInterpolants, 0 QuantifiedInterpolants, 5402 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1392 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 6256/6600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((((__int128) y * z) + ((__int128) 2 * z)) == ((6 + ((__int128) y * 12)) + ((__int128) x * 18))) && (((((__int128) y * z) + 6) + ((__int128) z * z)) == ((((__int128) z * 4) + ((__int128) x * 18)) + ((__int128) y * 24)))) && (z == (6 + ((__int128) 6 * n)))) && ((n < (a + 1)) || (((((__int128) 2 * y) + (6 * a)) + 10) == (((__int128) a * z) + ((__int128) 2 * z))))) && (a <= 20)) && (0 <= a)) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-10-11 02:03:22,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE