./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:14:47,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:14:47,171 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:14:47,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:14:47,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:14:47,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:14:47,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:14:47,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:14:47,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:14:47,205 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:14:47,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:14:47,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:14:47,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:14:47,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:14:47,208 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:14:47,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:14:47,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:14:47,209 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:14:47,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:14:47,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:14:47,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:14:47,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:14:47,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:14:47,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:14:47,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:14:47,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:14:47,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:14:47,213 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:14:47,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:14:47,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:14:47,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:14:47,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:14:47,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:14:47,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:14:47,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:14:47,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:14:47,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:14:47,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:14:47,215 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:14:47,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:14:47,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:14:47,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:14:47,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2024-11-21 21:14:47,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:14:47,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:14:47,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:14:47,469 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:14:47,470 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:14:47,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-21 21:14:48,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:14:48,861 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:14:48,862 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2024-11-21 21:14:48,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad310f199/a8ed4aaf3046470b871a7a92fa4639aa/FLAG8b2400289 [2024-11-21 21:14:48,886 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad310f199/a8ed4aaf3046470b871a7a92fa4639aa [2024-11-21 21:14:48,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:14:48,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:14:48,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:14:48,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:14:48,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:14:48,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:48" (1/1) ... [2024-11-21 21:14:48,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285466ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:48, skipping insertion in model container [2024-11-21 21:14:48,899 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:48" (1/1) ... [2024-11-21 21:14:48,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:14:49,120 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/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-21 21:14:49,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:14:49,172 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:14:49,180 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/bitvector/soft_float_3a.c.cil.c[728,741] [2024-11-21 21:14:49,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:14:49,210 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:14:49,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49 WrapperNode [2024-11-21 21:14:49,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:14:49,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:14:49,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:14:49,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:14:49,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,227 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,254 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-11-21 21:14:49,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:14:49,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:14:49,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:14:49,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:14:49,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,273 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,287 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]. [2024-11-21 21:14:49,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,301 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,303 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:14:49,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:14:49,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:14:49,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:14:49,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (1/1) ... [2024-11-21 21:14:49,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:14:49,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:49,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-21 21:14:49,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-21 21:14:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:14:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:14:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-21 21:14:49,371 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-21 21:14:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:14:49,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:14:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-21 21:14:49,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-21 21:14:49,419 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:14:49,421 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:14:49,713 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-11-21 21:14:49,713 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:14:49,727 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:14:49,727 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-21 21:14:49,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:49 BoogieIcfgContainer [2024-11-21 21:14:49,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:14:49,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:14:49,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:14:49,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:14:49,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:14:48" (1/3) ... [2024-11-21 21:14:49,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d544485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:49, skipping insertion in model container [2024-11-21 21:14:49,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:49" (2/3) ... [2024-11-21 21:14:49,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d544485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:49, skipping insertion in model container [2024-11-21 21:14:49,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:49" (3/3) ... [2024-11-21 21:14:49,734 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2024-11-21 21:14:49,747 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:14:49,748 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:14:49,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:14:49,793 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;@57e6899b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:14:49,794 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:14:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 67 states have internal predecessors, (101), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-21 21:14:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-21 21:14:49,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:49,805 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:49,805 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:49,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash 464012710, now seen corresponding path program 1 times [2024-11-21 21:14:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:49,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749963770] [2024-11-21 21:14:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-21 21:14:50,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:50,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749963770] [2024-11-21 21:14:50,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749963770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:50,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:14:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 21:14:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731199790] [2024-11-21 21:14:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:50,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 21:14:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 21:14:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:50,073 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 67 states have internal predecessors, (101), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:50,109 INFO L93 Difference]: Finished difference Result 146 states and 225 transitions. [2024-11-21 21:14:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 21:14:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-21 21:14:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:50,119 INFO L225 Difference]: With dead ends: 146 [2024-11-21 21:14:50,119 INFO L226 Difference]: Without dead ends: 68 [2024-11-21 21:14:50,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:50,125 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:50,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-21 21:14:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-21 21:14:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-21 21:14:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2024-11-21 21:14:50,158 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 41 [2024-11-21 21:14:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:50,159 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2024-11-21 21:14:50,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2024-11-21 21:14:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:14:50,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:50,161 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:50,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 21:14:50,162 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:50,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash 48639148, now seen corresponding path program 1 times [2024-11-21 21:14:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:50,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983071448] [2024-11-21 21:14:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-21 21:14:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983071448] [2024-11-21 21:14:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983071448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:14:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 21:14:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013993111] [2024-11-21 21:14:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:50,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:14:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:14:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-21 21:14:50,291 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:50,309 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2024-11-21 21:14:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 21:14:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-21 21:14:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:50,311 INFO L225 Difference]: With dead ends: 78 [2024-11-21 21:14:50,311 INFO L226 Difference]: Without dead ends: 68 [2024-11-21 21:14:50,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-21 21:14:50,312 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:50,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 280 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-21 21:14:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-21 21:14:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 61 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-21 21:14:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2024-11-21 21:14:50,320 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 43 [2024-11-21 21:14:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:50,321 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2024-11-21 21:14:50,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2024-11-21 21:14:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:14:50,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:50,322 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:50,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 21:14:50,323 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:50,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -760707478, now seen corresponding path program 1 times [2024-11-21 21:14:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971186659] [2024-11-21 21:14:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971186659] [2024-11-21 21:14:50,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971186659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663238831] [2024-11-21 21:14:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:50,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 21:14:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:50,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-21 21:14:50,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:50,587 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:50,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663238831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:50,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:50,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-21 21:14:50,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102142837] [2024-11-21 21:14:50,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:50,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:14:50,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:14:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:50,589 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:50,710 INFO L93 Difference]: Finished difference Result 154 states and 220 transitions. [2024-11-21 21:14:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:14:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-21 21:14:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:50,713 INFO L225 Difference]: With dead ends: 154 [2024-11-21 21:14:50,713 INFO L226 Difference]: Without dead ends: 89 [2024-11-21 21:14:50,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-21 21:14:50,714 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:50,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 219 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:14:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-21 21:14:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2024-11-21 21:14:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 73 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-21 21:14:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2024-11-21 21:14:50,724 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 43 [2024-11-21 21:14:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:50,724 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2024-11-21 21:14:50,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2024-11-21 21:14:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-21 21:14:50,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:50,728 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:50,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 21:14:50,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:50,930 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:50,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 753932532, now seen corresponding path program 1 times [2024-11-21 21:14:50,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:50,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122204528] [2024-11-21 21:14:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:50,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122204528] [2024-11-21 21:14:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122204528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477448865] [2024-11-21 21:14:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:50,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:50,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:50,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:50,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 21:14:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:51,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-21 21:14:51,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:51,079 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477448865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-21 21:14:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178834004] [2024-11-21 21:14:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:51,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:14:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:14:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:51,083 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:51,135 INFO L93 Difference]: Finished difference Result 170 states and 240 transitions. [2024-11-21 21:14:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 21:14:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-21 21:14:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:51,137 INFO L225 Difference]: With dead ends: 170 [2024-11-21 21:14:51,137 INFO L226 Difference]: Without dead ends: 96 [2024-11-21 21:14:51,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:51,138 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 15 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:51,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 235 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-21 21:14:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2024-11-21 21:14:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 78 states have internal predecessors, (107), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2024-11-21 21:14:51,152 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 46 [2024-11-21 21:14:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:51,153 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2024-11-21 21:14:51,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2024-11-21 21:14:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-21 21:14:51,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:51,154 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:51,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:51,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-21 21:14:51,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:51,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -518829479, now seen corresponding path program 1 times [2024-11-21 21:14:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:51,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87246455] [2024-11-21 21:14:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:51,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87246455] [2024-11-21 21:14:51,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87246455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703405043] [2024-11-21 21:14:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:51,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:51,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:51,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 21:14:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:51,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-21 21:14:51,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:51,538 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703405043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:51,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:51,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-21 21:14:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989825442] [2024-11-21 21:14:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:51,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:14:51,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:14:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:51,540 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:51,587 INFO L93 Difference]: Finished difference Result 176 states and 249 transitions. [2024-11-21 21:14:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 21:14:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-21 21:14:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:51,590 INFO L225 Difference]: With dead ends: 176 [2024-11-21 21:14:51,590 INFO L226 Difference]: Without dead ends: 97 [2024-11-21 21:14:51,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:51,591 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:51,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 237 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-21 21:14:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2024-11-21 21:14:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 79 states have internal predecessors, (109), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2024-11-21 21:14:51,604 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2024-11-21 21:14:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:51,604 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2024-11-21 21:14:51,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2024-11-21 21:14:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 21:14:51,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:51,606 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:51,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:51,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:51,808 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:51,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1747045464, now seen corresponding path program 1 times [2024-11-21 21:14:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349448451] [2024-11-21 21:14:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349448451] [2024-11-21 21:14:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349448451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520678440] [2024-11-21 21:14:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:51,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:51,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:51,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:51,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 21:14:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:51,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-21 21:14:51,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:51,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:52,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520678440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:14:52,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:14:52,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-21 21:14:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669831773] [2024-11-21 21:14:52,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:14:52,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:14:52,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:14:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:14:52,105 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:14:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:52,206 INFO L93 Difference]: Finished difference Result 227 states and 328 transitions. [2024-11-21 21:14:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:14:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-11-21 21:14:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:52,207 INFO L225 Difference]: With dead ends: 227 [2024-11-21 21:14:52,207 INFO L226 Difference]: Without dead ends: 147 [2024-11-21 21:14:52,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:52,208 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 116 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:52,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 361 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:14:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-21 21:14:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2024-11-21 21:14:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.434782608695652) internal successors, (132), 93 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2024-11-21 21:14:52,227 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 49 [2024-11-21 21:14:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:52,227 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2024-11-21 21:14:52,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:14:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2024-11-21 21:14:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 21:14:52,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:52,229 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:52,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:52,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:52,429 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:52,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash 134147808, now seen corresponding path program 1 times [2024-11-21 21:14:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310456749] [2024-11-21 21:14:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:52,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:52,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310456749] [2024-11-21 21:14:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310456749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926408367] [2024-11-21 21:14:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:52,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:52,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:52,510 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:52,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 21:14:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:52,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-21 21:14:52,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:52,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926408367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:14:52,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:14:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-21 21:14:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116358451] [2024-11-21 21:14:52,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:14:52,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:14:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:14:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:14:52,698 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:14:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:52,821 INFO L93 Difference]: Finished difference Result 246 states and 360 transitions. [2024-11-21 21:14:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:14:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2024-11-21 21:14:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:52,823 INFO L225 Difference]: With dead ends: 246 [2024-11-21 21:14:52,823 INFO L226 Difference]: Without dead ends: 152 [2024-11-21 21:14:52,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:52,824 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 76 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:52,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 564 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:14:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-21 21:14:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2024-11-21 21:14:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.4554455445544554) internal successors, (147), 102 states have internal predecessors, (147), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 160 transitions. [2024-11-21 21:14:52,841 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 160 transitions. Word has length 50 [2024-11-21 21:14:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:52,841 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 160 transitions. [2024-11-21 21:14:52,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:14:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 160 transitions. [2024-11-21 21:14:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-21 21:14:52,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:52,845 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:52,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:53,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,046 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:53,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:53,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1962941342, now seen corresponding path program 1 times [2024-11-21 21:14:53,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:53,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239257774] [2024-11-21 21:14:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:14:53,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239257774] [2024-11-21 21:14:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239257774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757860068] [2024-11-21 21:14:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:53,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:53,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 21:14:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-21 21:14:53,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-21 21:14:53,166 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:53,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757860068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:53,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:53,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-21 21:14:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782855549] [2024-11-21 21:14:53,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:53,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 21:14:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 21:14:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:53,168 INFO L87 Difference]: Start difference. First operand 110 states and 160 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:53,199 INFO L93 Difference]: Finished difference Result 222 states and 330 transitions. [2024-11-21 21:14:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 21:14:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-21 21:14:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:53,201 INFO L225 Difference]: With dead ends: 222 [2024-11-21 21:14:53,201 INFO L226 Difference]: Without dead ends: 119 [2024-11-21 21:14:53,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:53,203 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:53,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 170 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-21 21:14:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2024-11-21 21:14:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 104 states have internal predecessors, (149), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2024-11-21 21:14:53,218 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 162 transitions. Word has length 51 [2024-11-21 21:14:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:53,218 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 162 transitions. [2024-11-21 21:14:53,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 162 transitions. [2024-11-21 21:14:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-21 21:14:53,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:53,219 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:53,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-21 21:14:53,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,421 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:53,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:53,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1486287046, now seen corresponding path program 1 times [2024-11-21 21:14:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:53,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837579521] [2024-11-21 21:14:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:14:53,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:53,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837579521] [2024-11-21 21:14:53,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837579521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:53,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59100848] [2024-11-21 21:14:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:53,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:53,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 21:14:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-21 21:14:53,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-21 21:14:53,529 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:53,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59100848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:53,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:53,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-21 21:14:53,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870711560] [2024-11-21 21:14:53,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:53,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 21:14:53,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 21:14:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:53,531 INFO L87 Difference]: Start difference. First operand 112 states and 162 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:53,562 INFO L93 Difference]: Finished difference Result 220 states and 324 transitions. [2024-11-21 21:14:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 21:14:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-21 21:14:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:53,564 INFO L225 Difference]: With dead ends: 220 [2024-11-21 21:14:53,564 INFO L226 Difference]: Without dead ends: 115 [2024-11-21 21:14:53,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 21:14:53,564 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 169 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 [2024-11-21 21:14:53,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-21 21:14:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2024-11-21 21:14:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 100 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-21 21:14:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 154 transitions. [2024-11-21 21:14:53,572 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 154 transitions. Word has length 51 [2024-11-21 21:14:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:53,573 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 154 transitions. [2024-11-21 21:14:53,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 154 transitions. [2024-11-21 21:14:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-21 21:14:53,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:53,574 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:53,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-21 21:14:53,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,775 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:53,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -860981081, now seen corresponding path program 1 times [2024-11-21 21:14:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493702328] [2024-11-21 21:14:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493702328] [2024-11-21 21:14:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493702328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967131522] [2024-11-21 21:14:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:53,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:53,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:53,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:53,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 21:14:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:53,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-21 21:14:53,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:14:54,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:14:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967131522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:14:54,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:14:54,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 26 [2024-11-21 21:14:54,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642274811] [2024-11-21 21:14:54,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:14:54,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:14:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:14:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:14:54,366 INFO L87 Difference]: Start difference. First operand 108 states and 154 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:14:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:55,260 INFO L93 Difference]: Finished difference Result 328 states and 498 transitions. [2024-11-21 21:14:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-21 21:14:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2024-11-21 21:14:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:55,262 INFO L225 Difference]: With dead ends: 328 [2024-11-21 21:14:55,262 INFO L226 Difference]: Without dead ends: 198 [2024-11-21 21:14:55,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-11-21 21:14:55,264 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 198 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:55,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1322 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:14:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-21 21:14:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 118. [2024-11-21 21:14:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 104 states have (on average 1.3653846153846154) internal successors, (142), 108 states have internal predecessors, (142), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-21 21:14:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 174 transitions. [2024-11-21 21:14:55,275 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 174 transitions. Word has length 52 [2024-11-21 21:14:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:55,275 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 174 transitions. [2024-11-21 21:14:55,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:14:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 174 transitions. [2024-11-21 21:14:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:14:55,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:55,276 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:55,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:55,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-21 21:14:55,477 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:55,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1966952932, now seen corresponding path program 1 times [2024-11-21 21:14:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248086115] [2024-11-21 21:14:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:14:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:55,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248086115] [2024-11-21 21:14:55,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248086115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:55,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:14:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-21 21:14:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698101094] [2024-11-21 21:14:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:55,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-21 21:14:55,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-21 21:14:55,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-21 21:14:55,610 INFO L87 Difference]: Start difference. First operand 118 states and 174 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:55,664 INFO L93 Difference]: Finished difference Result 195 states and 290 transitions. [2024-11-21 21:14:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 21:14:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-21 21:14:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:55,668 INFO L225 Difference]: With dead ends: 195 [2024-11-21 21:14:55,668 INFO L226 Difference]: Without dead ends: 158 [2024-11-21 21:14:55,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-21 21:14:55,669 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 49 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:55,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 603 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-21 21:14:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2024-11-21 21:14:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 141 states have (on average 1.3617021276595744) internal successors, (192), 143 states have internal predecessors, (192), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-21 21:14:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 235 transitions. [2024-11-21 21:14:55,679 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 235 transitions. Word has length 55 [2024-11-21 21:14:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:55,679 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 235 transitions. [2024-11-21 21:14:55,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 235 transitions. [2024-11-21 21:14:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-21 21:14:55,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:55,680 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:55,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-21 21:14:55,680 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:55,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2216788, now seen corresponding path program 1 times [2024-11-21 21:14:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:55,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708119967] [2024-11-21 21:14:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-21 21:14:55,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708119967] [2024-11-21 21:14:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708119967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845722805] [2024-11-21 21:14:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:55,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:55,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:55,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:55,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 21:14:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:55,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:14:55,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:14:55,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:55,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845722805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:55,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-11-21 21:14:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963604959] [2024-11-21 21:14:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:55,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:14:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:14:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:55,906 INFO L87 Difference]: Start difference. First operand 157 states and 235 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:55,956 INFO L93 Difference]: Finished difference Result 320 states and 498 transitions. [2024-11-21 21:14:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:14:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-11-21 21:14:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:55,957 INFO L225 Difference]: With dead ends: 320 [2024-11-21 21:14:55,957 INFO L226 Difference]: Without dead ends: 170 [2024-11-21 21:14:55,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:55,958 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 14 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:55,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 326 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-21 21:14:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2024-11-21 21:14:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 145 states have (on average 1.3517241379310345) internal successors, (196), 147 states have internal predecessors, (196), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-21 21:14:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 239 transitions. [2024-11-21 21:14:55,971 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 239 transitions. Word has length 57 [2024-11-21 21:14:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:55,971 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 239 transitions. [2024-11-21 21:14:55,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:14:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 239 transitions. [2024-11-21 21:14:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-21 21:14:55,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:55,973 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:55,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-21 21:14:56,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:56,174 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:56,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1372749743, now seen corresponding path program 1 times [2024-11-21 21:14:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:56,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927711451] [2024-11-21 21:14:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:56,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927711451] [2024-11-21 21:14:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927711451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674042500] [2024-11-21 21:14:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:56,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:56,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 21:14:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:56,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-21 21:14:56,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:14:56,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:56,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674042500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:14:56,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:14:56,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-21 21:14:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700478811] [2024-11-21 21:14:56,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:14:56,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-21 21:14:56,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-21 21:14:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-11-21 21:14:56,456 INFO L87 Difference]: Start difference. First operand 161 states and 239 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:14:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:56,611 INFO L93 Difference]: Finished difference Result 383 states and 580 transitions. [2024-11-21 21:14:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 21:14:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2024-11-21 21:14:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:56,613 INFO L225 Difference]: With dead ends: 383 [2024-11-21 21:14:56,613 INFO L226 Difference]: Without dead ends: 229 [2024-11-21 21:14:56,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:14:56,615 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 121 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:56,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 464 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:14:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-21 21:14:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 170. [2024-11-21 21:14:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 154 states have (on average 1.3636363636363635) internal successors, (210), 156 states have internal predecessors, (210), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-21 21:14:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 253 transitions. [2024-11-21 21:14:56,625 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 253 transitions. Word has length 58 [2024-11-21 21:14:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:56,625 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 253 transitions. [2024-11-21 21:14:56,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:14:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 253 transitions. [2024-11-21 21:14:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-21 21:14:56,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:56,627 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:56,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:56,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-21 21:14:56,831 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:56,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash 34290157, now seen corresponding path program 1 times [2024-11-21 21:14:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:56,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538106250] [2024-11-21 21:14:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:56,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-21 21:14:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538106250] [2024-11-21 21:14:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538106250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103200800] [2024-11-21 21:14:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:56,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:56,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:56,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-21 21:14:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:57,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-21 21:14:57,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-21 21:14:57,052 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:14:57,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103200800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:57,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:14:57,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-11-21 21:14:57,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51454836] [2024-11-21 21:14:57,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:57,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:14:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:57,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:14:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:57,053 INFO L87 Difference]: Start difference. First operand 170 states and 253 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:57,078 INFO L93 Difference]: Finished difference Result 191 states and 275 transitions. [2024-11-21 21:14:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:14:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2024-11-21 21:14:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:57,081 INFO L225 Difference]: With dead ends: 191 [2024-11-21 21:14:57,081 INFO L226 Difference]: Without dead ends: 185 [2024-11-21 21:14:57,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:57,082 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:57,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 350 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-21 21:14:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-21 21:14:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 171 states have internal predecessors, (226), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2024-11-21 21:14:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 269 transitions. [2024-11-21 21:14:57,093 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 269 transitions. Word has length 58 [2024-11-21 21:14:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:57,093 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 269 transitions. [2024-11-21 21:14:57,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 269 transitions. [2024-11-21 21:14:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-21 21:14:57,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:57,095 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:57,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-21 21:14:57,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-21 21:14:57,295 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:57,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash 91548459, now seen corresponding path program 1 times [2024-11-21 21:14:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:57,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106704286] [2024-11-21 21:14:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:57,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-21 21:14:57,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:57,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106704286] [2024-11-21 21:14:57,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106704286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:14:57,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:14:57,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-21 21:14:57,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509873367] [2024-11-21 21:14:57,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:57,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-21 21:14:57,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-21 21:14:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:14:57,357 INFO L87 Difference]: Start difference. First operand 185 states and 269 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:57,375 INFO L93 Difference]: Finished difference Result 191 states and 274 transitions. [2024-11-21 21:14:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 21:14:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2024-11-21 21:14:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:57,377 INFO L225 Difference]: With dead ends: 191 [2024-11-21 21:14:57,377 INFO L226 Difference]: Without dead ends: 174 [2024-11-21 21:14:57,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-21 21:14:57,378 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 1 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:57,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 458 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-21 21:14:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2024-11-21 21:14:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 157 states have (on average 1.3375796178343948) internal successors, (210), 160 states have internal predecessors, (210), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-21 21:14:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 246 transitions. [2024-11-21 21:14:57,385 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 246 transitions. Word has length 58 [2024-11-21 21:14:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:57,386 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 246 transitions. [2024-11-21 21:14:57,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 246 transitions. [2024-11-21 21:14:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-21 21:14:57,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:57,387 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:57,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-21 21:14:57,387 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:57,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1233960022, now seen corresponding path program 1 times [2024-11-21 21:14:57,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:57,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899236219] [2024-11-21 21:14:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:57,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:14:57,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899236219] [2024-11-21 21:14:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899236219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:57,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490830348] [2024-11-21 21:14:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:57,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:57,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:57,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-21 21:14:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:57,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-21 21:14:57,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:14:57,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-21 21:14:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490830348] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:14:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2024-11-21 21:14:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044609222] [2024-11-21 21:14:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:14:57,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:14:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:14:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:14:57,643 INFO L87 Difference]: Start difference. First operand 172 states and 246 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:14:57,699 INFO L93 Difference]: Finished difference Result 188 states and 262 transitions. [2024-11-21 21:14:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 21:14:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-21 21:14:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:14:57,701 INFO L225 Difference]: With dead ends: 188 [2024-11-21 21:14:57,701 INFO L226 Difference]: Without dead ends: 176 [2024-11-21 21:14:57,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-21 21:14:57,702 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 8 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:14:57,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 260 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:14:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-21 21:14:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-11-21 21:14:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 158 states have (on average 1.3354430379746836) internal successors, (211), 161 states have internal predecessors, (211), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-21 21:14:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 247 transitions. [2024-11-21 21:14:57,711 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 247 transitions. Word has length 60 [2024-11-21 21:14:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:14:57,711 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 247 transitions. [2024-11-21 21:14:57,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:14:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 247 transitions. [2024-11-21 21:14:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-21 21:14:57,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:14:57,713 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:14:57,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-21 21:14:57,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-21 21:14:57,914 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:14:57,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:14:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash 647154008, now seen corresponding path program 1 times [2024-11-21 21:14:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:14:57,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519885509] [2024-11-21 21:14:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:14:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:14:58,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:14:58,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519885509] [2024-11-21 21:14:58,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519885509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:14:58,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065888858] [2024-11-21 21:14:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:14:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:14:58,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:14:58,045 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:14:58,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-21 21:14:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:14:58,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-21 21:14:58,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:14:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:14:58,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:14:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:14:58,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065888858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:14:58,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:14:58,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 15] total 32 [2024-11-21 21:14:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273930881] [2024-11-21 21:14:58,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:14:58,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-21 21:14:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:14:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-21 21:14:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2024-11-21 21:14:58,638 INFO L87 Difference]: Start difference. First operand 173 states and 247 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 28 states have internal predecessors, (101), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:00,604 INFO L93 Difference]: Finished difference Result 550 states and 846 transitions. [2024-11-21 21:15:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-21 21:15:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 28 states have internal predecessors, (101), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2024-11-21 21:15:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:00,606 INFO L225 Difference]: With dead ends: 550 [2024-11-21 21:15:00,606 INFO L226 Difference]: Without dead ends: 350 [2024-11-21 21:15:00,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=664, Invalid=5342, Unknown=0, NotChecked=0, Total=6006 [2024-11-21 21:15:00,608 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 418 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:00,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 2287 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 21:15:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-11-21 21:15:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 172. [2024-11-21 21:15:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 157 states have (on average 1.3312101910828025) internal successors, (209), 160 states have internal predecessors, (209), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-21 21:15:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 245 transitions. [2024-11-21 21:15:00,619 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 245 transitions. Word has length 60 [2024-11-21 21:15:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:00,619 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 245 transitions. [2024-11-21 21:15:00,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 28 states have internal predecessors, (101), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 245 transitions. [2024-11-21 21:15:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-21 21:15:00,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:00,620 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:00,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-21 21:15:00,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-21 21:15:00,821 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:00,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash -347975065, now seen corresponding path program 1 times [2024-11-21 21:15:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:00,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478956748] [2024-11-21 21:15:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478956748] [2024-11-21 21:15:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478956748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278986825] [2024-11-21 21:15:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:00,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:00,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:00,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-21 21:15:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:00,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-21 21:15:00,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:15:00,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:01,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278986825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:01,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:01,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-21 21:15:01,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187728604] [2024-11-21 21:15:01,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:01,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-21 21:15:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-21 21:15:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:15:01,113 INFO L87 Difference]: Start difference. First operand 172 states and 245 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:15:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:01,219 INFO L93 Difference]: Finished difference Result 433 states and 611 transitions. [2024-11-21 21:15:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-21 21:15:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2024-11-21 21:15:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:01,220 INFO L225 Difference]: With dead ends: 433 [2024-11-21 21:15:01,220 INFO L226 Difference]: Without dead ends: 272 [2024-11-21 21:15:01,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:15:01,222 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 274 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:01,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 533 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:15:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-21 21:15:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 186. [2024-11-21 21:15:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 171 states have (on average 1.3567251461988303) internal successors, (232), 174 states have internal predecessors, (232), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-21 21:15:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2024-11-21 21:15:01,232 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 62 [2024-11-21 21:15:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:01,232 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2024-11-21 21:15:01,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:15:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2024-11-21 21:15:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-21 21:15:01,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:01,234 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:01,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:01,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:01,435 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:01,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:01,435 INFO L85 PathProgramCache]: Analyzing trace with hash -756147989, now seen corresponding path program 2 times [2024-11-21 21:15:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129189666] [2024-11-21 21:15:01,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:15:01,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:01,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-21 21:15:01,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:15:01,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129189666] [2024-11-21 21:15:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129189666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:01,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:15:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-21 21:15:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304249094] [2024-11-21 21:15:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:01,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-21 21:15:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-21 21:15:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:15:01,533 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:01,568 INFO L93 Difference]: Finished difference Result 215 states and 305 transitions. [2024-11-21 21:15:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 21:15:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2024-11-21 21:15:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:01,569 INFO L225 Difference]: With dead ends: 215 [2024-11-21 21:15:01,569 INFO L226 Difference]: Without dead ends: 203 [2024-11-21 21:15:01,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:15:01,570 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:01,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 465 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-21 21:15:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2024-11-21 21:15:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 175 states have (on average 1.3542857142857143) internal successors, (237), 178 states have internal predecessors, (237), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2024-11-21 21:15:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 278 transitions. [2024-11-21 21:15:01,583 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 278 transitions. Word has length 67 [2024-11-21 21:15:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:01,583 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 278 transitions. [2024-11-21 21:15:01,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 278 transitions. [2024-11-21 21:15:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-21 21:15:01,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:01,584 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:01,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-21 21:15:01,585 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:01,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash 423747400, now seen corresponding path program 1 times [2024-11-21 21:15:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:01,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183408937] [2024-11-21 21:15:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-21 21:15:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183408937] [2024-11-21 21:15:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183408937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214391671] [2024-11-21 21:15:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:01,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:01,711 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:01,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-21 21:15:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:01,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-21 21:15:01,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-21 21:15:01,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-21 21:15:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214391671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:01,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-21 21:15:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279615803] [2024-11-21 21:15:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:01,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:15:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:15:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:15:01,857 INFO L87 Difference]: Start difference. First operand 191 states and 278 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 21:15:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:01,921 INFO L93 Difference]: Finished difference Result 199 states and 285 transitions. [2024-11-21 21:15:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:15:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 70 [2024-11-21 21:15:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:01,923 INFO L225 Difference]: With dead ends: 199 [2024-11-21 21:15:01,924 INFO L226 Difference]: Without dead ends: 157 [2024-11-21 21:15:01,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-11-21 21:15:01,925 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 7 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:01,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 711 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-21 21:15:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-21 21:15:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 142 states have (on average 1.3591549295774648) internal successors, (193), 146 states have internal predecessors, (193), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 223 transitions. [2024-11-21 21:15:01,936 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 223 transitions. Word has length 70 [2024-11-21 21:15:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:01,936 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 223 transitions. [2024-11-21 21:15:01,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 21:15:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 223 transitions. [2024-11-21 21:15:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-21 21:15:01,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:01,938 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:01,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:02,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:02,139 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:02,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1040241084, now seen corresponding path program 1 times [2024-11-21 21:15:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194647871] [2024-11-21 21:15:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194647871] [2024-11-21 21:15:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194647871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156800206] [2024-11-21 21:15:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:02,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-21 21:15:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:02,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-21 21:15:02,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:15:02,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:02,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156800206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:02,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:02,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-21 21:15:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352059025] [2024-11-21 21:15:02,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:02,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-21 21:15:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:02,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-21 21:15:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2024-11-21 21:15:02,693 INFO L87 Difference]: Start difference. First operand 157 states and 223 transitions. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:15:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:03,225 INFO L93 Difference]: Finished difference Result 444 states and 624 transitions. [2024-11-21 21:15:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:15:03,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2024-11-21 21:15:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:03,227 INFO L225 Difference]: With dead ends: 444 [2024-11-21 21:15:03,227 INFO L226 Difference]: Without dead ends: 298 [2024-11-21 21:15:03,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2024-11-21 21:15:03,228 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 304 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:03,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1393 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:15:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-21 21:15:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 172. [2024-11-21 21:15:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 161 states have internal predecessors, (217), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 247 transitions. [2024-11-21 21:15:03,238 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 247 transitions. Word has length 72 [2024-11-21 21:15:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:03,238 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 247 transitions. [2024-11-21 21:15:03,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:15:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 247 transitions. [2024-11-21 21:15:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-21 21:15:03,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:03,250 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:03,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:03,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:03,455 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:03,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash 290886744, now seen corresponding path program 3 times [2024-11-21 21:15:03,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:03,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651757299] [2024-11-21 21:15:03,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:15:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:03,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-21 21:15:03,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:15:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651757299] [2024-11-21 21:15:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651757299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:03,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772141880] [2024-11-21 21:15:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:15:03,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:03,913 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:03,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-21 21:15:04,083 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-21 21:15:04,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:04,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-21 21:15:04,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-21 21:15:04,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:15:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772141880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:04,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 48 [2024-11-21 21:15:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898036115] [2024-11-21 21:15:04,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:04,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-21 21:15:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-21 21:15:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2024-11-21 21:15:04,949 INFO L87 Difference]: Start difference. First operand 172 states and 247 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 44 states have internal predecessors, (139), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-21 21:15:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:07,126 INFO L93 Difference]: Finished difference Result 535 states and 799 transitions. [2024-11-21 21:15:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-21 21:15:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 44 states have internal predecessors, (139), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2024-11-21 21:15:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:07,129 INFO L225 Difference]: With dead ends: 535 [2024-11-21 21:15:07,129 INFO L226 Difference]: Without dead ends: 454 [2024-11-21 21:15:07,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=976, Invalid=4876, Unknown=0, NotChecked=0, Total=5852 [2024-11-21 21:15:07,132 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 885 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 4369 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:07,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 4369 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-21 21:15:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-11-21 21:15:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 167. [2024-11-21 21:15:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 152 states have (on average 1.381578947368421) internal successors, (210), 156 states have internal predecessors, (210), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 240 transitions. [2024-11-21 21:15:07,146 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 240 transitions. Word has length 72 [2024-11-21 21:15:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:07,146 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 240 transitions. [2024-11-21 21:15:07,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 44 states have internal predecessors, (139), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-21 21:15:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 240 transitions. [2024-11-21 21:15:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-21 21:15:07,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:07,148 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:07,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:07,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:07,349 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:07,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1807155101, now seen corresponding path program 1 times [2024-11-21 21:15:07,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:07,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486412309] [2024-11-21 21:15:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:07,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:07,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:07,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486412309] [2024-11-21 21:15:07,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486412309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:07,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079935163] [2024-11-21 21:15:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:07,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:07,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-21 21:15:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:07,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-21 21:15:07,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:15:07,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079935163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:07,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2024-11-21 21:15:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344216173] [2024-11-21 21:15:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:07,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 21:15:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 21:15:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:15:07,850 INFO L87 Difference]: Start difference. First operand 167 states and 240 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:15:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:08,245 INFO L93 Difference]: Finished difference Result 388 states and 561 transitions. [2024-11-21 21:15:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-21 21:15:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2024-11-21 21:15:08,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:08,259 INFO L225 Difference]: With dead ends: 388 [2024-11-21 21:15:08,259 INFO L226 Difference]: Without dead ends: 230 [2024-11-21 21:15:08,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2024-11-21 21:15:08,261 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 201 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:08,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 631 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:15:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-21 21:15:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 169. [2024-11-21 21:15:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 158 states have internal predecessors, (213), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-11-21 21:15:08,273 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 72 [2024-11-21 21:15:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:08,273 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-11-21 21:15:08,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-21 21:15:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-11-21 21:15:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-21 21:15:08,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:08,275 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:08,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:08,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:08,475 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:08,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 974959335, now seen corresponding path program 2 times [2024-11-21 21:15:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:08,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770478389] [2024-11-21 21:15:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:15:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:08,487 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:15:08,487 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770478389] [2024-11-21 21:15:08,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770478389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869143768] [2024-11-21 21:15:08,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:15:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:08,657 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:08,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-21 21:15:08,708 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:15:08,708 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:08,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-21 21:15:08,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:15:08,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869143768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:09,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:09,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-11-21 21:15:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065350975] [2024-11-21 21:15:09,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:09,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-21 21:15:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-21 21:15:09,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2024-11-21 21:15:09,150 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:15:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:09,319 INFO L93 Difference]: Finished difference Result 544 states and 764 transitions. [2024-11-21 21:15:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:15:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2024-11-21 21:15:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:09,321 INFO L225 Difference]: With dead ends: 544 [2024-11-21 21:15:09,321 INFO L226 Difference]: Without dead ends: 386 [2024-11-21 21:15:09,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2024-11-21 21:15:09,322 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 660 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:09,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 714 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:15:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-11-21 21:15:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 195. [2024-11-21 21:15:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 180 states have (on average 1.4222222222222223) internal successors, (256), 184 states have internal predecessors, (256), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2024-11-21 21:15:09,335 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 80 [2024-11-21 21:15:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:09,335 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2024-11-21 21:15:09,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:15:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2024-11-21 21:15:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-21 21:15:09,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:09,337 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:09,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:09,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:09,537 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:09,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1049993213, now seen corresponding path program 1 times [2024-11-21 21:15:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:09,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374460742] [2024-11-21 21:15:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-21 21:15:09,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374460742] [2024-11-21 21:15:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374460742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195603529] [2024-11-21 21:15:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:09,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:09,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:09,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-21 21:15:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:09,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-21 21:15:09,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-21 21:15:09,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:15:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195603529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:09,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:15:09,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-21 21:15:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351831106] [2024-11-21 21:15:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:09,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 21:15:09,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 21:15:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:15:09,687 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:15:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:09,726 INFO L93 Difference]: Finished difference Result 383 states and 575 transitions. [2024-11-21 21:15:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 21:15:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 85 [2024-11-21 21:15:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:09,727 INFO L225 Difference]: With dead ends: 383 [2024-11-21 21:15:09,728 INFO L226 Difference]: Without dead ends: 195 [2024-11-21 21:15:09,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:15:09,729 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:09,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 172 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-21 21:15:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 185. [2024-11-21 21:15:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 170 states have (on average 1.423529411764706) internal successors, (242), 174 states have internal predecessors, (242), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-21 21:15:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 272 transitions. [2024-11-21 21:15:09,745 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 272 transitions. Word has length 85 [2024-11-21 21:15:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:09,745 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 272 transitions. [2024-11-21 21:15:09,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:15:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 272 transitions. [2024-11-21 21:15:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-21 21:15:09,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:09,746 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:09,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:09,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-21 21:15:09,946 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:09,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1344908543, now seen corresponding path program 2 times [2024-11-21 21:15:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287070721] [2024-11-21 21:15:09,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:15:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:09,965 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:15:09,965 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:10,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287070721] [2024-11-21 21:15:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287070721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631274216] [2024-11-21 21:15:10,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:15:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:10,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:10,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-21 21:15:10,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:15:10,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:15:10,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-21 21:15:10,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:10,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:11,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631274216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:11,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 20] total 47 [2024-11-21 21:15:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420767043] [2024-11-21 21:15:11,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:11,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-21 21:15:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-21 21:15:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 21:15:11,534 INFO L87 Difference]: Start difference. First operand 185 states and 272 transitions. Second operand has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 44 states have internal predecessors, (156), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:18,104 INFO L93 Difference]: Finished difference Result 670 states and 987 transitions. [2024-11-21 21:15:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-21 21:15:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 44 states have internal predecessors, (156), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2024-11-21 21:15:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:18,107 INFO L225 Difference]: With dead ends: 670 [2024-11-21 21:15:18,107 INFO L226 Difference]: Without dead ends: 492 [2024-11-21 21:15:18,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5971 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3069, Invalid=17811, Unknown=0, NotChecked=0, Total=20880 [2024-11-21 21:15:18,111 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 1572 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:18,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2534 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 4237 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-21 21:15:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-21 21:15:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 199. [2024-11-21 21:15:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 181 states have (on average 1.408839779005525) internal successors, (255), 186 states have internal predecessors, (255), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (41), 9 states have call predecessors, (41), 8 states have call successors, (41) [2024-11-21 21:15:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 305 transitions. [2024-11-21 21:15:18,129 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 305 transitions. Word has length 87 [2024-11-21 21:15:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:18,129 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 305 transitions. [2024-11-21 21:15:18,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 44 states have internal predecessors, (156), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 305 transitions. [2024-11-21 21:15:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-21 21:15:18,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:18,130 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:18,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:18,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-21 21:15:18,331 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:18,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1006754097, now seen corresponding path program 1 times [2024-11-21 21:15:18,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:18,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029512260] [2024-11-21 21:15:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-21 21:15:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029512260] [2024-11-21 21:15:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029512260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:18,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481906465] [2024-11-21 21:15:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:18,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:18,448 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-21 21:15:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:18,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 21:15:18,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-21 21:15:18,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-21 21:15:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481906465] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:15:18,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 9] total 13 [2024-11-21 21:15:18,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714371957] [2024-11-21 21:15:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:18,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:15:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:15:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-21 21:15:18,618 INFO L87 Difference]: Start difference. First operand 199 states and 305 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:18,652 INFO L93 Difference]: Finished difference Result 211 states and 317 transitions. [2024-11-21 21:15:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:15:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 90 [2024-11-21 21:15:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:18,654 INFO L225 Difference]: With dead ends: 211 [2024-11-21 21:15:18,654 INFO L226 Difference]: Without dead ends: 206 [2024-11-21 21:15:18,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-21 21:15:18,654 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:18,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-21 21:15:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-21 21:15:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 188 states have (on average 1.3936170212765957) internal successors, (262), 193 states have internal predecessors, (262), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (41), 9 states have call predecessors, (41), 8 states have call successors, (41) [2024-11-21 21:15:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 312 transitions. [2024-11-21 21:15:18,677 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 312 transitions. Word has length 90 [2024-11-21 21:15:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:18,677 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 312 transitions. [2024-11-21 21:15:18,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 312 transitions. [2024-11-21 21:15:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-21 21:15:18,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:18,678 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:18,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:18,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-21 21:15:18,882 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:18,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 948601360, now seen corresponding path program 1 times [2024-11-21 21:15:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106647275] [2024-11-21 21:15:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-21 21:15:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106647275] [2024-11-21 21:15:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106647275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113747164] [2024-11-21 21:15:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:18,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:18,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:18,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-21 21:15:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:19,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-21 21:15:19,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-21 21:15:19,080 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:15:19,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113747164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:19,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:15:19,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 9 [2024-11-21 21:15:19,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002558988] [2024-11-21 21:15:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:19,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-21 21:15:19,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-21 21:15:19,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-21 21:15:19,081 INFO L87 Difference]: Start difference. First operand 206 states and 312 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:15:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:19,143 INFO L93 Difference]: Finished difference Result 316 states and 470 transitions. [2024-11-21 21:15:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 21:15:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2024-11-21 21:15:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:19,145 INFO L225 Difference]: With dead ends: 316 [2024-11-21 21:15:19,145 INFO L226 Difference]: Without dead ends: 257 [2024-11-21 21:15:19,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:15:19,146 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 46 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:19,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 616 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-21 21:15:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 242. [2024-11-21 21:15:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 221 states have (on average 1.3846153846153846) internal successors, (306), 223 states have internal predecessors, (306), 12 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (62), 15 states have call predecessors, (62), 11 states have call successors, (62) [2024-11-21 21:15:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 380 transitions. [2024-11-21 21:15:19,164 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 380 transitions. Word has length 91 [2024-11-21 21:15:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:19,165 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 380 transitions. [2024-11-21 21:15:19,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-21 21:15:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 380 transitions. [2024-11-21 21:15:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-21 21:15:19,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:19,167 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:19,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:19,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:19,371 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:19,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash -740342382, now seen corresponding path program 1 times [2024-11-21 21:15:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:19,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845840628] [2024-11-21 21:15:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:19,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:15:19,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845840628] [2024-11-21 21:15:19,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845840628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331728120] [2024-11-21 21:15:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:19,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:19,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:19,822 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:19,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-21 21:15:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:19,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-21 21:15:19,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-21 21:15:20,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-21 21:15:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331728120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:20,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 12] total 41 [2024-11-21 21:15:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525590287] [2024-11-21 21:15:20,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:20,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-21 21:15:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-21 21:15:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1532, Unknown=0, NotChecked=0, Total=1640 [2024-11-21 21:15:20,930 INFO L87 Difference]: Start difference. First operand 242 states and 380 transitions. Second operand has 41 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 34 states have internal predecessors, (124), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-21 21:15:26,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-21 21:15:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:27,177 INFO L93 Difference]: Finished difference Result 652 states and 1120 transitions. [2024-11-21 21:15:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-21 21:15:27,178 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 34 states have internal predecessors, (124), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) Word has length 91 [2024-11-21 21:15:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:27,181 INFO L225 Difference]: With dead ends: 652 [2024-11-21 21:15:27,181 INFO L226 Difference]: Without dead ends: 504 [2024-11-21 21:15:27,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=322, Invalid=3584, Unknown=0, NotChecked=0, Total=3906 [2024-11-21 21:15:27,183 INFO L432 NwaCegarLoop]: 224 mSDtfsCounter, 682 mSDsluCounter, 6082 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 298 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 6306 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:27,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 6306 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2543 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-21 21:15:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-21 21:15:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 272. [2024-11-21 21:15:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 239 states have (on average 1.3556485355648535) internal successors, (324), 244 states have internal predecessors, (324), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 24 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 515 transitions. [2024-11-21 21:15:27,212 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 515 transitions. Word has length 91 [2024-11-21 21:15:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:27,212 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 515 transitions. [2024-11-21 21:15:27,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 34 states have internal predecessors, (124), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-21 21:15:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 515 transitions. [2024-11-21 21:15:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-21 21:15:27,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:27,214 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:27,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:27,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-21 21:15:27,418 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:27,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 182855605, now seen corresponding path program 1 times [2024-11-21 21:15:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:27,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279289642] [2024-11-21 21:15:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-21 21:15:27,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:27,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279289642] [2024-11-21 21:15:27,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279289642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:27,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:15:27,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-21 21:15:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978961157] [2024-11-21 21:15:27,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:27,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-21 21:15:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-21 21:15:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-21 21:15:27,711 INFO L87 Difference]: Start difference. First operand 272 states and 515 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:27,848 INFO L93 Difference]: Finished difference Result 332 states and 594 transitions. [2024-11-21 21:15:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:15:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 93 [2024-11-21 21:15:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:27,850 INFO L225 Difference]: With dead ends: 332 [2024-11-21 21:15:27,850 INFO L226 Difference]: Without dead ends: 320 [2024-11-21 21:15:27,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:15:27,851 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 26 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:27,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 832 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:15:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-21 21:15:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 296. [2024-11-21 21:15:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 263 states have (on average 1.3460076045627376) internal successors, (354), 267 states have internal predecessors, (354), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 25 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 545 transitions. [2024-11-21 21:15:27,875 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 545 transitions. Word has length 93 [2024-11-21 21:15:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:27,875 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 545 transitions. [2024-11-21 21:15:27,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 545 transitions. [2024-11-21 21:15:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-21 21:15:27,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:27,877 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:27,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-21 21:15:27,877 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:27,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash -470733758, now seen corresponding path program 1 times [2024-11-21 21:15:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:27,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234258814] [2024-11-21 21:15:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-21 21:15:27,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234258814] [2024-11-21 21:15:27,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234258814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445374282] [2024-11-21 21:15:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:27,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:27,984 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-21 21:15:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:28,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-21 21:15:28,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-21 21:15:28,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-21 21:15:28,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445374282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:28,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:28,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-21 21:15:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331727421] [2024-11-21 21:15:28,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:28,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:15:28,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:15:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:15:28,209 INFO L87 Difference]: Start difference. First operand 296 states and 545 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 21:15:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:28,302 INFO L93 Difference]: Finished difference Result 340 states and 596 transitions. [2024-11-21 21:15:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:15:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 96 [2024-11-21 21:15:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:28,305 INFO L225 Difference]: With dead ends: 340 [2024-11-21 21:15:28,305 INFO L226 Difference]: Without dead ends: 305 [2024-11-21 21:15:28,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:15:28,306 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 41 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:28,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1045 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:15:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-21 21:15:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 296. [2024-11-21 21:15:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 263 states have (on average 1.338403041825095) internal successors, (352), 267 states have internal predecessors, (352), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 25 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 543 transitions. [2024-11-21 21:15:28,330 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 543 transitions. Word has length 96 [2024-11-21 21:15:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:28,330 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 543 transitions. [2024-11-21 21:15:28,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-21 21:15:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 543 transitions. [2024-11-21 21:15:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-21 21:15:28,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:28,332 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:28,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:28,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-21 21:15:28,537 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:28,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2135289796, now seen corresponding path program 1 times [2024-11-21 21:15:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:28,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994059467] [2024-11-21 21:15:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:28,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 124 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994059467] [2024-11-21 21:15:28,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994059467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303751872] [2024-11-21 21:15:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:28,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:28,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:28,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:28,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-21 21:15:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:29,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 21:15:29,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-21 21:15:29,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-21 21:15:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303751872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:29,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2024-11-21 21:15:29,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322874301] [2024-11-21 21:15:29,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:29,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:15:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:15:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:15:29,491 INFO L87 Difference]: Start difference. First operand 296 states and 543 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-21 21:15:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:30,280 INFO L93 Difference]: Finished difference Result 620 states and 1124 transitions. [2024-11-21 21:15:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-21 21:15:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 96 [2024-11-21 21:15:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:30,283 INFO L225 Difference]: With dead ends: 620 [2024-11-21 21:15:30,284 INFO L226 Difference]: Without dead ends: 361 [2024-11-21 21:15:30,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2024-11-21 21:15:30,287 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 189 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:30,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1623 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:15:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-21 21:15:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 296. [2024-11-21 21:15:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 263 states have (on average 1.3307984790874525) internal successors, (350), 267 states have internal predecessors, (350), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 25 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 541 transitions. [2024-11-21 21:15:30,323 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 541 transitions. Word has length 96 [2024-11-21 21:15:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:30,323 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 541 transitions. [2024-11-21 21:15:30,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 24 states have internal predecessors, (100), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-21 21:15:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 541 transitions. [2024-11-21 21:15:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-21 21:15:30,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:30,326 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:30,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:30,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-21 21:15:30,526 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:30,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1069775733, now seen corresponding path program 1 times [2024-11-21 21:15:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37097895] [2024-11-21 21:15:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 151 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37097895] [2024-11-21 21:15:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37097895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325173058] [2024-11-21 21:15:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:30,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:30,834 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:30,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-21 21:15:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:31,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-21 21:15:31,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-21 21:15:32,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-11-21 21:15:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325173058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:32,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 38 [2024-11-21 21:15:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183015790] [2024-11-21 21:15:32,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:32,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-21 21:15:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-21 21:15:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2024-11-21 21:15:32,726 INFO L87 Difference]: Start difference. First operand 296 states and 541 transitions. Second operand has 38 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 35 states have internal predecessors, (128), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-21 21:15:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:37,096 INFO L93 Difference]: Finished difference Result 715 states and 1265 transitions. [2024-11-21 21:15:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-21 21:15:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 35 states have internal predecessors, (128), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 101 [2024-11-21 21:15:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:37,101 INFO L225 Difference]: With dead ends: 715 [2024-11-21 21:15:37,101 INFO L226 Difference]: Without dead ends: 452 [2024-11-21 21:15:37,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=827, Invalid=8103, Unknown=0, NotChecked=0, Total=8930 [2024-11-21 21:15:37,106 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 395 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:37,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 2509 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-21 21:15:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-21 21:15:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 283. [2024-11-21 21:15:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 250 states have (on average 1.34) internal successors, (335), 255 states have internal predecessors, (335), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 24 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 526 transitions. [2024-11-21 21:15:37,135 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 526 transitions. Word has length 101 [2024-11-21 21:15:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:37,136 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 526 transitions. [2024-11-21 21:15:37,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 35 states have internal predecessors, (128), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-21 21:15:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 526 transitions. [2024-11-21 21:15:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-21 21:15:37,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:37,138 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:37,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-21 21:15:37,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:37,339 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:37,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -841799409, now seen corresponding path program 1 times [2024-11-21 21:15:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773110751] [2024-11-21 21:15:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:37,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:37,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773110751] [2024-11-21 21:15:37,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773110751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:37,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516614656] [2024-11-21 21:15:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:37,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:37,745 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:37,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-21 21:15:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:38,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-21 21:15:38,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-11-21 21:15:38,134 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:15:38,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516614656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:38,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:15:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16] total 22 [2024-11-21 21:15:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26435108] [2024-11-21 21:15:38,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:38,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-21 21:15:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-21 21:15:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-21 21:15:38,136 INFO L87 Difference]: Start difference. First operand 283 states and 526 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:38,204 INFO L93 Difference]: Finished difference Result 341 states and 595 transitions. [2024-11-21 21:15:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 21:15:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 104 [2024-11-21 21:15:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:38,206 INFO L225 Difference]: With dead ends: 341 [2024-11-21 21:15:38,207 INFO L226 Difference]: Without dead ends: 294 [2024-11-21 21:15:38,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-21 21:15:38,207 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:38,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 650 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-21 21:15:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 285. [2024-11-21 21:15:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 252 states have (on average 1.3373015873015872) internal successors, (337), 257 states have internal predecessors, (337), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 24 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 528 transitions. [2024-11-21 21:15:38,239 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 528 transitions. Word has length 104 [2024-11-21 21:15:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:38,239 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 528 transitions. [2024-11-21 21:15:38,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 528 transitions. [2024-11-21 21:15:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-21 21:15:38,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:38,241 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:38,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:38,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:38,449 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:38,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1459037654, now seen corresponding path program 1 times [2024-11-21 21:15:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140887451] [2024-11-21 21:15:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:38,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140887451] [2024-11-21 21:15:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140887451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506710021] [2024-11-21 21:15:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:38,835 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:38,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-21 21:15:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:38,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 21:15:38,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-11-21 21:15:38,988 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:15:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506710021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:15:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2024-11-21 21:15:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713719798] [2024-11-21 21:15:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:38,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 21:15:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 21:15:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:15:38,990 INFO L87 Difference]: Start difference. First operand 285 states and 528 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:39,051 INFO L93 Difference]: Finished difference Result 353 states and 610 transitions. [2024-11-21 21:15:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:15:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2024-11-21 21:15:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:39,053 INFO L225 Difference]: With dead ends: 353 [2024-11-21 21:15:39,053 INFO L226 Difference]: Without dead ends: 295 [2024-11-21 21:15:39,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:15:39,054 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 5 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:39,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 569 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:15:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-21 21:15:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-11-21 21:15:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 260 states have (on average 1.323076923076923) internal successors, (344), 264 states have internal predecessors, (344), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 25 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 535 transitions. [2024-11-21 21:15:39,078 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 535 transitions. Word has length 105 [2024-11-21 21:15:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:39,079 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 535 transitions. [2024-11-21 21:15:39,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 535 transitions. [2024-11-21 21:15:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-21 21:15:39,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:39,081 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:39,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-21 21:15:39,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:39,284 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:39,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1230697038, now seen corresponding path program 1 times [2024-11-21 21:15:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312264768] [2024-11-21 21:15:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:15:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312264768] [2024-11-21 21:15:39,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312264768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472288245] [2024-11-21 21:15:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:39,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:39,636 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:39,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-21 21:15:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:39,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-21 21:15:39,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-11-21 21:15:40,056 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:15:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472288245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:15:40,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:15:40,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2024-11-21 21:15:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113819851] [2024-11-21 21:15:40,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:15:40,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-21 21:15:40,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-21 21:15:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-21 21:15:40,058 INFO L87 Difference]: Start difference. First operand 293 states and 535 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:40,195 INFO L93 Difference]: Finished difference Result 324 states and 574 transitions. [2024-11-21 21:15:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:15:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 106 [2024-11-21 21:15:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:40,201 INFO L225 Difference]: With dead ends: 324 [2024-11-21 21:15:40,201 INFO L226 Difference]: Without dead ends: 312 [2024-11-21 21:15:40,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-21 21:15:40,202 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:40,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 935 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:15:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-21 21:15:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 297. [2024-11-21 21:15:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 264 states have (on average 1.321969696969697) internal successors, (349), 268 states have internal predecessors, (349), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (170), 25 states have call predecessors, (170), 20 states have call successors, (170) [2024-11-21 21:15:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 540 transitions. [2024-11-21 21:15:40,250 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 540 transitions. Word has length 106 [2024-11-21 21:15:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:40,256 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 540 transitions. [2024-11-21 21:15:40,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-21 21:15:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 540 transitions. [2024-11-21 21:15:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-21 21:15:40,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:40,258 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:40,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-21 21:15:40,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-21 21:15:40,459 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:40,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash 971048519, now seen corresponding path program 1 times [2024-11-21 21:15:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:40,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353090300] [2024-11-21 21:15:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 4 proven. 288 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:15:40,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:15:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353090300] [2024-11-21 21:15:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353090300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:15:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995344895] [2024-11-21 21:15:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:15:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:15:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:15:40,857 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:15:40,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-21 21:15:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:15:40,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-21 21:15:40,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:15:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 10 proven. 288 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:15:41,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:15:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 10 proven. 288 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:15:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995344895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:15:42,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:15:42,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 27] total 68 [2024-11-21 21:15:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500289537] [2024-11-21 21:15:42,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:15:42,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-21 21:15:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:15:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-21 21:15:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=4155, Unknown=0, NotChecked=0, Total=4556 [2024-11-21 21:15:42,901 INFO L87 Difference]: Start difference. First operand 297 states and 540 transitions. Second operand has 68 states, 68 states have (on average 3.411764705882353) internal successors, (232), 64 states have internal predecessors, (232), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:15:59,552 INFO L93 Difference]: Finished difference Result 1179 states and 2149 transitions. [2024-11-21 21:15:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2024-11-21 21:15:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.411764705882353) internal successors, (232), 64 states have internal predecessors, (232), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 107 [2024-11-21 21:15:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:15:59,557 INFO L225 Difference]: With dead ends: 1179 [2024-11-21 21:15:59,557 INFO L226 Difference]: Without dead ends: 839 [2024-11-21 21:15:59,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14132 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=7672, Invalid=41390, Unknown=0, NotChecked=0, Total=49062 [2024-11-21 21:15:59,564 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 3824 mSDsluCounter, 4848 mSDsCounter, 0 mSdLazyCounter, 9299 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3847 SdHoareTripleChecker+Valid, 4964 SdHoareTripleChecker+Invalid, 10505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-21 21:15:59,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3847 Valid, 4964 Invalid, 10505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9299 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-21 21:15:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-11-21 21:15:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 319. [2024-11-21 21:15:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 286 states have (on average 1.3496503496503496) internal successors, (386), 290 states have internal predecessors, (386), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (158), 25 states have call predecessors, (158), 20 states have call successors, (158) [2024-11-21 21:15:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 565 transitions. [2024-11-21 21:15:59,603 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 565 transitions. Word has length 107 [2024-11-21 21:15:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:15:59,603 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 565 transitions. [2024-11-21 21:15:59,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.411764705882353) internal successors, (232), 64 states have internal predecessors, (232), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-21 21:15:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 565 transitions. [2024-11-21 21:15:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-21 21:15:59,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:15:59,605 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:15:59,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-21 21:15:59,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-21 21:15:59,806 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:15:59,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:15:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash 761533415, now seen corresponding path program 3 times [2024-11-21 21:15:59,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:15:59,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158961225] [2024-11-21 21:15:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:15:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:15:59,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-21 21:15:59,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:16:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:16:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:16:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158961225] [2024-11-21 21:16:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158961225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:16:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108118094] [2024-11-21 21:16:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:16:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:16:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:16:00,268 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:16:00,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-21 21:16:00,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-21 21:16:00,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:16:00,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-21 21:16:00,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:16:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:16:00,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:16:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 21:16:01,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108118094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:16:01,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:16:01,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-11-21 21:16:01,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117082646] [2024-11-21 21:16:01,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:16:01,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-21 21:16:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:16:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-21 21:16:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2024-11-21 21:16:01,600 INFO L87 Difference]: Start difference. First operand 319 states and 565 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:16:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:16:02,049 INFO L93 Difference]: Finished difference Result 942 states and 1457 transitions. [2024-11-21 21:16:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-21 21:16:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2024-11-21 21:16:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:16:02,053 INFO L225 Difference]: With dead ends: 942 [2024-11-21 21:16:02,053 INFO L226 Difference]: Without dead ends: 692 [2024-11-21 21:16:02,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2024-11-21 21:16:02,055 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 1587 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:16:02,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 895 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:16:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2024-11-21 21:16:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 369. [2024-11-21 21:16:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 336 states have (on average 1.3958333333333333) internal successors, (469), 340 states have internal predecessors, (469), 21 states have call successors, (21), 3 states have call predecessors, (21), 11 states have return successors, (158), 25 states have call predecessors, (158), 20 states have call successors, (158) [2024-11-21 21:16:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 648 transitions. [2024-11-21 21:16:02,101 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 648 transitions. Word has length 116 [2024-11-21 21:16:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:16:02,101 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 648 transitions. [2024-11-21 21:16:02,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-21 21:16:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 648 transitions. [2024-11-21 21:16:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-21 21:16:02,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:16:02,104 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:16:02,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-21 21:16:02,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-21 21:16:02,305 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:16:02,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:16:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1501271937, now seen corresponding path program 3 times [2024-11-21 21:16:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:16:02,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717403632] [2024-11-21 21:16:02,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:16:02,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:16:02,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-21 21:16:02,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:16:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 475 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:16:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:16:03,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717403632] [2024-11-21 21:16:03,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717403632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:16:03,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914715277] [2024-11-21 21:16:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:16:03,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:16:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:16:03,025 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:16:03,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-21 21:16:03,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-21 21:16:03,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:16:03,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-21 21:16:03,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:16:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 475 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:16:04,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:16:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 475 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-21 21:16:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914715277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:16:05,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:16:05,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 30] total 76 [2024-11-21 21:16:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245887888] [2024-11-21 21:16:05,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:16:05,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-21 21:16:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:16:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-21 21:16:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=5088, Unknown=0, NotChecked=0, Total=5700 [2024-11-21 21:16:05,666 INFO L87 Difference]: Start difference. First operand 369 states and 648 transitions. Second operand has 76 states, 76 states have (on average 3.236842105263158) internal successors, (246), 73 states have internal predecessors, (246), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10)