./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.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 cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:00:22,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:00:22,659 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:00:22,663 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:00:22,664 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:00:22,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:00:22,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:00:22,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:00:22,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:00:22,701 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:00:22,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:00:22,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:00:22,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:00:22,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:00:22,703 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:00:22,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:00:22,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:00:22,705 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:00:22,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:00:22,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:00:22,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:00:22,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:00:22,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:00:22,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:00:22,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:00:22,708 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:00:22,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:00:22,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:00:22,708 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:00:22,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:00:22,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:00:22,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:00:22,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:00:22,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:00:22,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:00:22,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:00:22,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:00:22,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:00:22,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:00:22,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:00:22,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:00:22,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:00:22,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d [2024-11-16 07:00:22,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:00:22,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:00:22,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:00:22,995 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:00:22,995 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:00:22,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-11-16 07:00:24,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:00:24,599 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:00:24,600 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-11-16 07:00:24,614 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a971714/95afcc80319642dd9c00c6b08a063dfa/FLAG6d1feeb48 [2024-11-16 07:00:24,997 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a971714/95afcc80319642dd9c00c6b08a063dfa [2024-11-16 07:00:25,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:00:25,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:00:25,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:00:25,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:00:25,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:00:25,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:00:24" (1/1) ... [2024-11-16 07:00:25,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608f1484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25, skipping insertion in model container [2024-11-16 07:00:25,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:00:24" (1/1) ... [2024-11-16 07:00:25,030 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:00:25,197 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i[951,964] [2024-11-16 07:00:25,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:00:25,219 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:00:25,232 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i[951,964] [2024-11-16 07:00:25,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:00:25,259 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:00:25,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25 WrapperNode [2024-11-16 07:00:25,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:00:25,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:00:25,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:00:25,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:00:25,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,294 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2024-11-16 07:00:25,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:00:25,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:00:25,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:00:25,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:00:25,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,322 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,331 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]. [2024-11-16 07:00:25,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,334 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:00:25,338 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:00:25,338 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:00:25,338 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:00:25,339 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (1/1) ... [2024-11-16 07:00:25,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:00:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:25,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 07:00:25,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 07:00:25,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:00:25,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:00:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:00:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:00:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 07:00:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 07:00:25,490 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:00:25,492 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:00:25,612 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-16 07:00:25,612 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:00:25,622 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:00:25,622 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:00:25,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:00:25 BoogieIcfgContainer [2024-11-16 07:00:25,623 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:00:25,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:00:25,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:00:25,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:00:25,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:00:24" (1/3) ... [2024-11-16 07:00:25,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f67c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:00:25, skipping insertion in model container [2024-11-16 07:00:25,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:00:25" (2/3) ... [2024-11-16 07:00:25,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f67c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:00:25, skipping insertion in model container [2024-11-16 07:00:25,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:00:25" (3/3) ... [2024-11-16 07:00:25,632 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2024-11-16 07:00:25,645 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:00:25,645 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:00:25,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:00:25,702 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;@4cb6e587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:00:25,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:00:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2024-11-16 07:00:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-16 07:00:25,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:25,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:25,716 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:25,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash -713334522, now seen corresponding path program 1 times [2024-11-16 07:00:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:25,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456676504] [2024-11-16 07:00:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:25,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456676504] [2024-11-16 07:00:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456676504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:00:25,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:00:25,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 07:00:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333724268] [2024-11-16 07:00:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:00:25,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 07:00:25,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:25,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 07:00:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:00:25,923 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 4.0) internal successors, (8), 2 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) [2024-11-16 07:00:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:25,940 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2024-11-16 07:00:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 07:00:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2024-11-16 07:00:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:25,946 INFO L225 Difference]: With dead ends: 39 [2024-11-16 07:00:25,946 INFO L226 Difference]: Without dead ends: 18 [2024-11-16 07:00:25,949 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 [2024-11-16 07:00:25,952 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:25,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-16 07:00:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-16 07:00:25,978 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) [2024-11-16 07:00:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-11-16 07:00:25,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2024-11-16 07:00:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:25,981 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-11-16 07:00:25,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2024-11-16 07:00:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-11-16 07:00:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:00:25,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:25,982 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:25,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:00:25,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:25,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1822105214, now seen corresponding path program 1 times [2024-11-16 07:00:25,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:25,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329920166] [2024-11-16 07:00:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:26,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:26,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329920166] [2024-11-16 07:00:26,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329920166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:00:26,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:00:26,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 07:00:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803893749] [2024-11-16 07:00:26,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:00:26,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 07:00:26,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 07:00:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 07:00:26,100 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-16 07:00:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:26,121 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-11-16 07:00:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 07:00:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2024-11-16 07:00:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:26,126 INFO L225 Difference]: With dead ends: 33 [2024-11-16 07:00:26,126 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 07:00:26,126 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 [2024-11-16 07:00:26,128 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 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 [2024-11-16 07:00:26,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 07:00:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-16 07:00:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-11-16 07:00:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-16 07:00:26,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-11-16 07:00:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:26,135 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-16 07:00:26,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-16 07:00:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-11-16 07:00:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-16 07:00:26,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:26,136 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:26,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 07:00:26,137 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:26,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash -377603857, now seen corresponding path program 1 times [2024-11-16 07:00:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:26,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223269535] [2024-11-16 07:00:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:26,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223269535] [2024-11-16 07:00:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223269535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:00:26,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:00:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 07:00:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792370223] [2024-11-16 07:00:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:00:26,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:00:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:00:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:00:26,258 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-16 07:00:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:26,283 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-16 07:00:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:00:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2024-11-16 07:00:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:26,286 INFO L225 Difference]: With dead ends: 32 [2024-11-16 07:00:26,286 INFO L226 Difference]: Without dead ends: 24 [2024-11-16 07:00:26,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:00:26,289 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:26,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-16 07:00:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-16 07:00:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2024-11-16 07:00:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-11-16 07:00:26,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2024-11-16 07:00:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:26,300 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-11-16 07:00:26,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-16 07:00:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-11-16 07:00:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-16 07:00:26,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:26,301 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:26,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 07:00:26,302 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:26,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:26,303 INFO L85 PathProgramCache]: Analyzing trace with hash -347127664, now seen corresponding path program 1 times [2024-11-16 07:00:26,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:26,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142371920] [2024-11-16 07:00:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:00:26,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024714334] [2024-11-16 07:00:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:26,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:26,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:26,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 07:00:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:26,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:00:26,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:26,520 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:00:26,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:26,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142371920] [2024-11-16 07:00:26,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:00:26,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024714334] [2024-11-16 07:00:26,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024714334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:00:26,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:00:26,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:00:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434083279] [2024-11-16 07:00:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:00:26,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:00:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:00:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:00:26,529 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-16 07:00:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:26,595 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-16 07:00:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:00:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2024-11-16 07:00:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:26,597 INFO L225 Difference]: With dead ends: 36 [2024-11-16 07:00:26,598 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 07:00:26,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:00:26,600 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:26,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 07:00:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-16 07:00:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2024-11-16 07:00:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-16 07:00:26,615 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 12 [2024-11-16 07:00:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:26,615 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-16 07:00:26,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-16 07:00:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-16 07:00:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 07:00:26,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:26,616 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:26,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 07:00:26,821 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 [2024-11-16 07:00:26,822 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:26,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1354479857, now seen corresponding path program 1 times [2024-11-16 07:00:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805554500] [2024-11-16 07:00:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:26,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 07:00:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:27,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:27,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805554500] [2024-11-16 07:00:27,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805554500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:00:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891552950] [2024-11-16 07:00:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:27,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:27,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 07:00:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:00:27,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:27,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:00:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:27,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891552950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:00:27,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:00:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-16 07:00:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120575705] [2024-11-16 07:00:27,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:00:27,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:00:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:00:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:00:27,167 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2024-11-16 07:00:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:27,296 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2024-11-16 07:00:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 07:00:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 21 [2024-11-16 07:00:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:27,299 INFO L225 Difference]: With dead ends: 130 [2024-11-16 07:00:27,299 INFO L226 Difference]: Without dead ends: 122 [2024-11-16 07:00:27,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-16 07:00:27,300 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:27,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 146 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:00:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-16 07:00:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2024-11-16 07:00:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 88 states have internal predecessors, (111), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-16 07:00:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-11-16 07:00:27,319 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 21 [2024-11-16 07:00:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:27,320 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-11-16 07:00:27,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2024-11-16 07:00:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-11-16 07:00:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 07:00:27,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:27,321 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:27,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 07:00:27,525 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 [2024-11-16 07:00:27,526 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:27,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1324003664, now seen corresponding path program 1 times [2024-11-16 07:00:27,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:27,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654242786] [2024-11-16 07:00:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 07:00:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:27,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654242786] [2024-11-16 07:00:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654242786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:00:27,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:00:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 07:00:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712745453] [2024-11-16 07:00:27,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:00:27,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 07:00:27,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 07:00:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 07:00:27,751 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-11-16 07:00:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:27,777 INFO L93 Difference]: Finished difference Result 178 states and 217 transitions. [2024-11-16 07:00:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 07:00:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2024-11-16 07:00:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:27,781 INFO L225 Difference]: With dead ends: 178 [2024-11-16 07:00:27,781 INFO L226 Difference]: Without dead ends: 88 [2024-11-16 07:00:27,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 07:00:27,782 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:27,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-16 07:00:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-16 07:00:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 73 states have internal predecessors, (92), 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) [2024-11-16 07:00:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-16 07:00:27,804 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 21 [2024-11-16 07:00:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:27,805 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-16 07:00:27,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-11-16 07:00:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-16 07:00:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 07:00:27,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:27,807 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:27,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 07:00:27,808 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:27,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1575274352, now seen corresponding path program 1 times [2024-11-16 07:00:27,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:27,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929253066] [2024-11-16 07:00:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-16 07:00:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 07:00:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929253066] [2024-11-16 07:00:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929253066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:00:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721839863] [2024-11-16 07:00:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:27,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:27,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 07:00:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:27,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 07:00:27,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 07:00:27,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:00:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 07:00:28,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721839863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:00:28,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:00:28,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-16 07:00:28,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940767693] [2024-11-16 07:00:28,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:00:28,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 07:00:28,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:28,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 07:00:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:00:28,022 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2024-11-16 07:00:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:28,084 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2024-11-16 07:00:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:00:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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 23 [2024-11-16 07:00:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:28,086 INFO L225 Difference]: With dead ends: 159 [2024-11-16 07:00:28,086 INFO L226 Difference]: Without dead ends: 88 [2024-11-16 07:00:28,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:00:28,087 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:28,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:00:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-16 07:00:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-16 07:00:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 73 states have internal predecessors, (89), 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) [2024-11-16 07:00:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2024-11-16 07:00:28,103 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 23 [2024-11-16 07:00:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:28,103 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2024-11-16 07:00:28,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2024-11-16 07:00:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2024-11-16 07:00:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 07:00:28,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:28,105 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:28,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 07:00:28,309 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 [2024-11-16 07:00:28,309 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:28,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1237668861, now seen corresponding path program 1 times [2024-11-16 07:00:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:28,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792446030] [2024-11-16 07:00:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:00:28,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841156468] [2024-11-16 07:00:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:28,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:28,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:28,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 07:00:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:28,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 07:00:28,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:00:28,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:00:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792446030] [2024-11-16 07:00:30,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:00:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841156468] [2024-11-16 07:00:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841156468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:00:30,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:00:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-16 07:00:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715434705] [2024-11-16 07:00:30,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 07:00:30,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 07:00:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 07:00:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-16 07:00:30,318 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-16 07:00:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:30,445 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2024-11-16 07:00:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 07:00:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 24 [2024-11-16 07:00:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:30,449 INFO L225 Difference]: With dead ends: 111 [2024-11-16 07:00:30,450 INFO L226 Difference]: Without dead ends: 105 [2024-11-16 07:00:30,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-16 07:00:30,451 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:30,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:00:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-16 07:00:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2024-11-16 07:00:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 76 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 07:00:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2024-11-16 07:00:30,474 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2024-11-16 07:00:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:30,474 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2024-11-16 07:00:30,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-16 07:00:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2024-11-16 07:00:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 07:00:30,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:30,476 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:30,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 07:00:30,676 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 [2024-11-16 07:00:30,676 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:30,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1375091229, now seen corresponding path program 2 times [2024-11-16 07:00:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229710104] [2024-11-16 07:00:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:31,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 07:00:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:31,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-16 07:00:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:00:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:00:31,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:00:31,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229710104] [2024-11-16 07:00:31,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229710104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:00:31,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343005142] [2024-11-16 07:00:31,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:00:31,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:31,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:31,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 07:00:31,186 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:00:31,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:00:31,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 07:00:31,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:00:31,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:00:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:00:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343005142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:00:31,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:00:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-11-16 07:00:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629134283] [2024-11-16 07:00:31,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:00:31,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 07:00:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:00:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 07:00:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-16 07:00:31,612 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-11-16 07:00:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:00:31,702 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2024-11-16 07:00:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 07:00:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 33 [2024-11-16 07:00:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:00:31,704 INFO L225 Difference]: With dead ends: 154 [2024-11-16 07:00:31,704 INFO L226 Difference]: Without dead ends: 77 [2024-11-16 07:00:31,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-16 07:00:31,706 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:00:31,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:00:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-16 07:00:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2024-11-16 07:00:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 55 states have internal predecessors, (64), 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) [2024-11-16 07:00:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-11-16 07:00:31,719 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 33 [2024-11-16 07:00:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:00:31,720 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-11-16 07:00:31,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-11-16 07:00:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-11-16 07:00:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 07:00:31,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:00:31,721 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 07:00:31,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 07:00:31,922 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 [2024-11-16 07:00:31,922 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:00:31,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:00:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 188956592, now seen corresponding path program 3 times [2024-11-16 07:00:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:00:31,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532360601] [2024-11-16 07:00:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:00:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:00:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:00:31,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228147061] [2024-11-16 07:00:31,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:00:31,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:00:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:00:31,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:00:31,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 07:00:32,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 07:00:32,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:00:32,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-16 07:00:32,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:00:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:00:32,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:01:00,558 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse3 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse1 (div .cse3 2)) (.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (< .cse0 .cse1) (not (= .cse2 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (= (mod (+ (* (mod .cse1 2) 4294967295) |c_ULTIMATE.start_main_~r~0#1| (* (div (mod .cse1 4294967296) 2) 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse2) (not (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse1 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse2)) (< .cse3 (+ .cse0 1))))) is different from true [2024-11-16 07:01:29,604 WARN L286 SmtUtils]: Spent 12.65s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 07:01:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2024-11-16 07:01:47,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:01:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532360601] [2024-11-16 07:01:47,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:01:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228147061] [2024-11-16 07:01:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228147061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:01:47,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:01:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-11-16 07:01:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226502156] [2024-11-16 07:01:47,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:01:47,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 07:01:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:01:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 07:01:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=413, Unknown=1, NotChecked=42, Total=552 [2024-11-16 07:01:47,910 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 07:02:07,771 WARN L286 SmtUtils]: Spent 19.46s on a formula simplification. DAG size of input: 64 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)