./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/divbin2_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:07:15,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:07:15,315 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:07:15,319 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:07:15,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:07:15,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:07:15,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:07:15,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:07:15,355 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:07:15,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:07:15,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:07:15,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:07:15,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:07:15,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:07:15,361 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:07:15,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:07:15,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:07:15,362 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:07:15,363 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:07:15,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:07:15,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:07:15,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:07:15,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:07:15,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:07:15,367 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:07:15,367 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:07:15,367 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:07:15,368 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:07:15,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:07:15,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:07:15,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:07:15,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:07:15,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:07:15,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:07:15,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:07:15,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:07:15,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:07:15,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:07:15,372 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:07:15,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:07:15,372 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:07:15,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:07:15,373 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2024-10-24 00:07:15,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:07:15,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:07:15,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:07:15,678 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:07:15,678 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:07:15,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2024-10-24 00:07:17,149 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:07:17,368 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:07:17,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2024-10-24 00:07:17,385 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cf14899/81c857548a914037960a6ebf0a76b794/FLAGa66a640ea [2024-10-24 00:07:17,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62cf14899/81c857548a914037960a6ebf0a76b794 [2024-10-24 00:07:17,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:07:17,739 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:07:17,743 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:07:17,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:07:17,748 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:07:17,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:17,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cffa589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17, skipping insertion in model container [2024-10-24 00:07:17,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:17,772 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:07:17,931 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/divbin2_unwindbound5.i[951,964] [2024-10-24 00:07:17,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:07:17,954 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:07:17,967 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/divbin2_unwindbound5.i[951,964] [2024-10-24 00:07:17,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:07:17,986 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:07:17,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17 WrapperNode [2024-10-24 00:07:17,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:07:17,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:07:17,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:07:17,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:07:17,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,015 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-10-24 00:07:18,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:07:18,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:07:18,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:07:18,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:07:18,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,046 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]. [2024-10-24 00:07:18,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:07:18,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:07:18,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:07:18,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:07:18,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (1/1) ... [2024-10-24 00:07:18,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:07:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:18,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:07:18,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:07:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:07:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:07:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:07:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:07:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:07:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:07:18,251 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:07:18,253 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:07:18,403 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-24 00:07:18,403 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:07:18,431 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:07:18,433 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:07:18,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:07:18 BoogieIcfgContainer [2024-10-24 00:07:18,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:07:18,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:07:18,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:07:18,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:07:18,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:07:17" (1/3) ... [2024-10-24 00:07:18,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afdd2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:07:18, skipping insertion in model container [2024-10-24 00:07:18,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:07:17" (2/3) ... [2024-10-24 00:07:18,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afdd2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:07:18, skipping insertion in model container [2024-10-24 00:07:18,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:07:18" (3/3) ... [2024-10-24 00:07:18,440 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2024-10-24 00:07:18,452 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:07:18,453 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:07:18,505 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:07:18,511 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;@1094f2fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:07:18,511 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:07:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:07:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 00:07:18,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:18,525 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:18,526 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:18,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2024-10-24 00:07:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971744572] [2024-10-24 00:07:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:18,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971744572] [2024-10-24 00:07:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971744572] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:07:18,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:07:18,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:07:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768603699] [2024-10-24 00:07:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:07:18,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:07:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:07:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:07:18,738 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:07:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:18,758 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2024-10-24 00:07:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:07:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 00:07:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:18,766 INFO L225 Difference]: With dead ends: 32 [2024-10-24 00:07:18,767 INFO L226 Difference]: Without dead ends: 16 [2024-10-24 00:07:18,769 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 [2024-10-24 00:07:18,773 INFO L432 NwaCegarLoop]: 21 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, 21 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 [2024-10-24 00:07:18,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:07:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-24 00:07:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-24 00:07:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2024-10-24 00:07:18,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 7 [2024-10-24 00:07:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:18,801 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2024-10-24 00:07:18,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:07:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2024-10-24 00:07:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 00:07:18,803 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:18,803 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:18,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:07:18,803 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:18,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2024-10-24 00:07:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:18,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462439674] [2024-10-24 00:07:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:18,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462439674] [2024-10-24 00:07:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462439674] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:07:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:07:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 00:07:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022370457] [2024-10-24 00:07:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:07:18,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 00:07:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 00:07:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:07:18,955 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-24 00:07:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:18,977 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-10-24 00:07:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 00:07:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2024-10-24 00:07:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:18,978 INFO L225 Difference]: With dead ends: 30 [2024-10-24 00:07:18,979 INFO L226 Difference]: Without dead ends: 18 [2024-10-24 00:07:18,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:07:18,980 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:18,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:07:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-24 00:07:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-24 00:07:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-10-24 00:07:18,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2024-10-24 00:07:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:18,989 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-10-24 00:07:18,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-24 00:07:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-10-24 00:07:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 00:07:18,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:18,991 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:18,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:07:18,992 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:18,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2024-10-24 00:07:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017443444] [2024-10-24 00:07:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017443444] [2024-10-24 00:07:19,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017443444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:07:19,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:07:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:07:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255693701] [2024-10-24 00:07:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:07:19,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:07:19,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:07:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:07:19,159 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-10-24 00:07:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:19,200 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-10-24 00:07:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:07:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2024-10-24 00:07:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:19,202 INFO L225 Difference]: With dead ends: 29 [2024-10-24 00:07:19,202 INFO L226 Difference]: Without dead ends: 22 [2024-10-24 00:07:19,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:07:19,204 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:19,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:07:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-24 00:07:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-10-24 00:07:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-10-24 00:07:19,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2024-10-24 00:07:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:19,211 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-10-24 00:07:19,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-10-24 00:07:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-10-24 00:07:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 00:07:19,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:19,212 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:19,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 00:07:19,213 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:19,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2024-10-24 00:07:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:19,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770338572] [2024-10-24 00:07:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:07:19,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491640120] [2024-10-24 00:07:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:19,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:19,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:19,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:07:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:19,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:07:19,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:19,442 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:07:19,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770338572] [2024-10-24 00:07:19,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:07:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491640120] [2024-10-24 00:07:19,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491640120] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:07:19,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:07:19,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 00:07:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218336934] [2024-10-24 00:07:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:07:19,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:07:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:07:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:07:19,448 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 00:07:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:19,518 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-10-24 00:07:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:07:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-10-24 00:07:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:19,520 INFO L225 Difference]: With dead ends: 33 [2024-10-24 00:07:19,520 INFO L226 Difference]: Without dead ends: 30 [2024-10-24 00:07:19,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:07:19,522 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:19,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:07:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-24 00:07:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-10-24 00:07:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:07:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-10-24 00:07:19,536 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2024-10-24 00:07:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:19,537 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-10-24 00:07:19,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 00:07:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-10-24 00:07:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 00:07:19,538 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:19,538 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:19,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 00:07:19,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:19,740 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:19,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1010218476, now seen corresponding path program 1 times [2024-10-24 00:07:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:19,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842426026] [2024-10-24 00:07:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:19,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:19,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:07:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:19,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842426026] [2024-10-24 00:07:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842426026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:07:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88909136] [2024-10-24 00:07:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:19,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:19,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:19,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:07:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:19,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:07:19,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:20,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:07:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:20,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88909136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:07:20,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:07:20,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-10-24 00:07:20,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563457636] [2024-10-24 00:07:20,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:07:20,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 00:07:20,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 00:07:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:07:20,130 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:07:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:20,251 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2024-10-24 00:07:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 00:07:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-10-24 00:07:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:20,254 INFO L225 Difference]: With dead ends: 100 [2024-10-24 00:07:20,254 INFO L226 Difference]: Without dead ends: 93 [2024-10-24 00:07:20,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:07:20,255 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:20,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 117 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:07:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-24 00:07:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2024-10-24 00:07:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 00:07:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2024-10-24 00:07:20,277 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 19 [2024-10-24 00:07:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:20,278 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2024-10-24 00:07:20,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:07:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2024-10-24 00:07:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 00:07:20,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:20,280 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:20,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:07:20,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:20,482 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:20,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1008431016, now seen corresponding path program 1 times [2024-10-24 00:07:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638535876] [2024-10-24 00:07:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:20,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:07:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:07:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638535876] [2024-10-24 00:07:20,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638535876] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:07:20,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:07:20,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 00:07:20,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941524652] [2024-10-24 00:07:20,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:07:20,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 00:07:20,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 00:07:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 00:07:20,660 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:20,686 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2024-10-24 00:07:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 00:07:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-24 00:07:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:20,687 INFO L225 Difference]: With dead ends: 134 [2024-10-24 00:07:20,688 INFO L226 Difference]: Without dead ends: 64 [2024-10-24 00:07:20,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 00:07:20,689 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:20,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:07:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-24 00:07:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-24 00:07:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 00:07:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2024-10-24 00:07:20,707 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 19 [2024-10-24 00:07:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:20,707 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2024-10-24 00:07:20,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2024-10-24 00:07:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 00:07:20,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:20,709 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:20,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 00:07:20,710 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:20,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1211901843, now seen corresponding path program 1 times [2024-10-24 00:07:20,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825696903] [2024-10-24 00:07:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:20,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:20,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:07:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 00:07:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825696903] [2024-10-24 00:07:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825696903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:07:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418877482] [2024-10-24 00:07:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:20,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:07:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:20,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 00:07:20,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 00:07:20,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:07:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 00:07:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418877482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:07:20,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:07:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-24 00:07:20,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866152065] [2024-10-24 00:07:20,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:07:20,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:07:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:07:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:07:20,942 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:07:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:21,007 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2024-10-24 00:07:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:07:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-24 00:07:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:21,011 INFO L225 Difference]: With dead ends: 117 [2024-10-24 00:07:21,012 INFO L226 Difference]: Without dead ends: 66 [2024-10-24 00:07:21,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:07:21,013 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:21,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:07:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-24 00:07:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-24 00:07:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 55 states have internal predecessors, (67), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 00:07:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-10-24 00:07:21,026 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 21 [2024-10-24 00:07:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:21,026 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-10-24 00:07:21,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:07:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-10-24 00:07:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 00:07:21,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:21,027 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:21,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:07:21,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:21,228 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:21,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1424589502, now seen corresponding path program 1 times [2024-10-24 00:07:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368041981] [2024-10-24 00:07:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:21,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:07:21,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551207520] [2024-10-24 00:07:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:21,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:21,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:07:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:21,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:07:21,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 00:07:21,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:07:36,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:36,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368041981] [2024-10-24 00:07:36,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:07:36,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551207520] [2024-10-24 00:07:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551207520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:07:36,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:07:36,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-24 00:07:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644124876] [2024-10-24 00:07:36,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:07:36,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:07:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:07:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=145, Unknown=2, NotChecked=0, Total=182 [2024-10-24 00:07:36,216 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:36,337 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2024-10-24 00:07:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 00:07:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-10-24 00:07:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:36,338 INFO L225 Difference]: With dead ends: 79 [2024-10-24 00:07:36,338 INFO L226 Difference]: Without dead ends: 75 [2024-10-24 00:07:36,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2024-10-24 00:07:36,340 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:36,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:07:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-24 00:07:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2024-10-24 00:07:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 53 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 00:07:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-10-24 00:07:36,349 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 22 [2024-10-24 00:07:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:36,350 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-10-24 00:07:36,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:07:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-10-24 00:07:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 00:07:36,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:36,351 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 00:07:36,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:07:36,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:36,556 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:36,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 334382651, now seen corresponding path program 2 times [2024-10-24 00:07:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748957003] [2024-10-24 00:07:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:36,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 00:07:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:36,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 00:07:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:07:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:07:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748957003] [2024-10-24 00:07:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748957003] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:07:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137442223] [2024-10-24 00:07:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:07:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:36,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:36,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:07:37,024 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:07:37,025 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:07:37,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 00:07:37,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:07:37,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:07:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:07:37,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137442223] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:07:37,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:07:37,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-10-24 00:07:37,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520499746] [2024-10-24 00:07:37,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:07:37,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:07:37,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:07:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:07:37,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:07:37,505 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:07:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:07:37,645 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2024-10-24 00:07:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:07:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 31 [2024-10-24 00:07:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:07:37,647 INFO L225 Difference]: With dead ends: 102 [2024-10-24 00:07:37,647 INFO L226 Difference]: Without dead ends: 53 [2024-10-24 00:07:37,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:07:37,649 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:07:37,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:07:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-24 00:07:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-10-24 00:07:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 00:07:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-24 00:07:37,665 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 31 [2024-10-24 00:07:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:07:37,665 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-24 00:07:37,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:07:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-24 00:07:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:07:37,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:07:37,666 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 00:07:37,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:07:37,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:37,867 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:07:37,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:07:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2025398815, now seen corresponding path program 1 times [2024-10-24 00:07:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:07:37,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125899129] [2024-10-24 00:07:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:07:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:07:37,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462754968] [2024-10-24 00:07:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:07:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:07:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:07:37,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:07:37,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:07:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:07:38,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 00:07:38,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:07:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 00:07:38,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:08:12,665 WARN L286 SmtUtils]: Spent 16.06s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-24 00:08:32,707 WARN L286 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-24 00:08:48,758 WARN L286 SmtUtils]: Spent 16.05s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)