./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.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 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:21:41,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:21:41,314 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:21:41,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:21:41,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:21:41,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:21:41,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:21:41,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:21:41,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:21:41,358 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:21:41,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:21:41,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:21:41,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:21:41,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:21:41,361 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:21:41,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:21:41,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:21:41,362 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:21:41,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:21:41,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:21:41,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:21:41,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:21:41,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:21:41,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:21:41,367 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:21:41,367 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:21:41,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:21:41,368 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:21:41,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:21:41,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:21:41,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:21:41,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:21:41,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:21:41,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:21:41,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:21:41,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:21:41,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:21:41,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:21:41,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:21:41,371 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:21:41,371 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:21:41,372 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:21:41,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2024-10-24 00:21:41,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:21:41,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:21:41,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:21:41,647 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:21:41,647 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:21:41,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2024-10-24 00:21:43,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:21:43,333 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:21:43,334 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2024-10-24 00:21:43,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119f89677/05d8336eefb54631895dccae215dfc34/FLAGf294d399e [2024-10-24 00:21:43,354 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119f89677/05d8336eefb54631895dccae215dfc34 [2024-10-24 00:21:43,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:21:43,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:21:43,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:21:43,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:21:43,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:21:43,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee5297a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43, skipping insertion in model container [2024-10-24 00:21:43,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,387 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:21:43,586 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2024-10-24 00:21:43,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:21:43,644 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:21:43,679 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2024-10-24 00:21:43,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:21:43,712 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:21:43,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43 WrapperNode [2024-10-24 00:21:43,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:21:43,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:21:43,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:21:43,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:21:43,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,747 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-24 00:21:43,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:21:43,750 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:21:43,750 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:21:43,750 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:21:43,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,775 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-24 00:21:43,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:21:43,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:21:43,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:21:43,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:21:43,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (1/1) ... [2024-10-24 00:21:43,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:21:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:43,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:21:43,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:21:43,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:21:43,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:21:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 00:21:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:21:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:21:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:21:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:21:43,939 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:21:43,940 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:21:44,084 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-24 00:21:44,084 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:21:44,113 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:21:44,113 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:21:44,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:21:44 BoogieIcfgContainer [2024-10-24 00:21:44,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:21:44,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:21:44,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:21:44,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:21:44,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:21:43" (1/3) ... [2024-10-24 00:21:44,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fdf54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:21:44, skipping insertion in model container [2024-10-24 00:21:44,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:21:43" (2/3) ... [2024-10-24 00:21:44,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fdf54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:21:44, skipping insertion in model container [2024-10-24 00:21:44,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:21:44" (3/3) ... [2024-10-24 00:21:44,126 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2024-10-24 00:21:44,142 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:21:44,142 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:21:44,200 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:21:44,205 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;@2954a5d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:21:44,206 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:21:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 00:21:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 00:21:44,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:44,217 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:44,217 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:44,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2024-10-24 00:21:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:44,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519030886] [2024-10-24 00:21:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:21:44,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:44,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519030886] [2024-10-24 00:21:44,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519030886] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:44,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:44,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:21:44,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684450684] [2024-10-24 00:21:44,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:44,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:21:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:21:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:21:44,454 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:44,493 INFO L93 Difference]: Finished difference Result 45 states and 78 transitions. [2024-10-24 00:21:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:21:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 00:21:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:44,516 INFO L225 Difference]: With dead ends: 45 [2024-10-24 00:21:44,520 INFO L226 Difference]: Without dead ends: 21 [2024-10-24 00:21:44,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:21:44,527 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:44,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:21:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-24 00:21:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-24 00:21:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:21:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2024-10-24 00:21:44,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 7 [2024-10-24 00:21:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:44,573 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2024-10-24 00:21:44,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2024-10-24 00:21:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 00:21:44,574 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:44,575 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:44,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:21:44,575 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:44,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2024-10-24 00:21:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:44,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420439640] [2024-10-24 00:21:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:44,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:21:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420439640] [2024-10-24 00:21:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420439640] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:44,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 00:21:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058974361] [2024-10-24 00:21:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:44,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:21:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:21:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:21:44,822 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:44,911 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2024-10-24 00:21:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:21:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 00:21:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:44,913 INFO L225 Difference]: With dead ends: 35 [2024-10-24 00:21:44,913 INFO L226 Difference]: Without dead ends: 33 [2024-10-24 00:21:44,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:21:44,915 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:44,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 90 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-24 00:21:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2024-10-24 00:21:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:21:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-10-24 00:21:44,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 7 [2024-10-24 00:21:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:44,931 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-10-24 00:21:44,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-10-24 00:21:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 00:21:44,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:44,933 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:44,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:21:44,933 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:44,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2024-10-24 00:21:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:44,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485807662] [2024-10-24 00:21:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:21:45,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485807662] [2024-10-24 00:21:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485807662] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:45,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 00:21:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442659908] [2024-10-24 00:21:45,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:45,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 00:21:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 00:21:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:21:45,003 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:45,023 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-10-24 00:21:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 00:21:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 00:21:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:45,025 INFO L225 Difference]: With dead ends: 41 [2024-10-24 00:21:45,025 INFO L226 Difference]: Without dead ends: 27 [2024-10-24 00:21:45,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:21:45,026 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:45,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:21:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-24 00:21:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-24 00:21:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:21:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-24 00:21:45,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2024-10-24 00:21:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:45,041 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-24 00:21:45,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:21:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-24 00:21:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 00:21:45,042 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:45,042 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:45,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 00:21:45,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:45,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2024-10-24 00:21:45,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:45,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790403534] [2024-10-24 00:21:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:45,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:21:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:21:45,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790403534] [2024-10-24 00:21:45,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790403534] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:45,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:45,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:21:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074610321] [2024-10-24 00:21:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:45,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:21:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:21:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:21:45,206 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:21:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:45,355 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-10-24 00:21:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:21:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-24 00:21:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:45,356 INFO L225 Difference]: With dead ends: 41 [2024-10-24 00:21:45,357 INFO L226 Difference]: Without dead ends: 39 [2024-10-24 00:21:45,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:21:45,358 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:45,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-24 00:21:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-10-24 00:21:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:21:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-10-24 00:21:45,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2024-10-24 00:21:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:45,367 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-10-24 00:21:45,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 00:21:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-10-24 00:21:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-24 00:21:45,368 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:45,368 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:45,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 00:21:45,368 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:45,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2024-10-24 00:21:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:45,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921482721] [2024-10-24 00:21:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470361513] [2024-10-24 00:21:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:45,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:45,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:45,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:21:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:45,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 00:21:45,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:21:45,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:21:45,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:45,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921482721] [2024-10-24 00:21:45,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:45,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470361513] [2024-10-24 00:21:45,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470361513] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:45,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:45,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:21:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871571806] [2024-10-24 00:21:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:45,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:21:45,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:21:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:21:45,592 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:21:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:45,678 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2024-10-24 00:21:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:21:45,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-24 00:21:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:45,680 INFO L225 Difference]: With dead ends: 60 [2024-10-24 00:21:45,680 INFO L226 Difference]: Without dead ends: 45 [2024-10-24 00:21:45,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:21:45,681 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:45,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-24 00:21:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-24 00:21:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 29 states have internal predecessors, (35), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-24 00:21:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-10-24 00:21:45,691 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 17 [2024-10-24 00:21:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:45,691 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-10-24 00:21:45,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:21:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-10-24 00:21:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 00:21:45,699 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:45,699 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:45,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:21:45,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:45,901 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:45,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2024-10-24 00:21:45,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:45,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074046771] [2024-10-24 00:21:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:45,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:45,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374120689] [2024-10-24 00:21:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:45,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:45,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:45,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:21:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:45,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:21:45,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 00:21:46,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 00:21:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074046771] [2024-10-24 00:21:46,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374120689] [2024-10-24 00:21:46,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374120689] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:46,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:21:46,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-24 00:21:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201515769] [2024-10-24 00:21:46,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:46,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:21:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:21:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:21:46,298 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:21:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:46,450 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-10-24 00:21:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 00:21:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-10-24 00:21:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:46,454 INFO L225 Difference]: With dead ends: 63 [2024-10-24 00:21:46,454 INFO L226 Difference]: Without dead ends: 60 [2024-10-24 00:21:46,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:21:46,458 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:46,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-24 00:21:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-10-24 00:21:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-24 00:21:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2024-10-24 00:21:46,482 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 25 [2024-10-24 00:21:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:46,482 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2024-10-24 00:21:46,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:21:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2024-10-24 00:21:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 00:21:46,484 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:46,484 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:46,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 00:21:46,688 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,SelfDestructingSolverStorable5 [2024-10-24 00:21:46,689 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:46,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:46,689 INFO L85 PathProgramCache]: Analyzing trace with hash 292094342, now seen corresponding path program 1 times [2024-10-24 00:21:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064536203] [2024-10-24 00:21:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:21:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:21:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:21:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:21:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:21:46,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064536203] [2024-10-24 00:21:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064536203] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:21:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418353641] [2024-10-24 00:21:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:46,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:46,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:21:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:46,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 00:21:46,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-24 00:21:46,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:21:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418353641] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:47,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:21:47,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-24 00:21:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618093603] [2024-10-24 00:21:47,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:47,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:21:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:21:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:21:47,009 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:21:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:47,157 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2024-10-24 00:21:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:21:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 32 [2024-10-24 00:21:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:47,160 INFO L225 Difference]: With dead ends: 154 [2024-10-24 00:21:47,160 INFO L226 Difference]: Without dead ends: 129 [2024-10-24 00:21:47,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:21:47,165 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:47,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 122 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-24 00:21:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2024-10-24 00:21:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.205128205128205) internal successors, (94), 82 states have internal predecessors, (94), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-24 00:21:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2024-10-24 00:21:47,200 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 32 [2024-10-24 00:21:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:47,200 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2024-10-24 00:21:47,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:21:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2024-10-24 00:21:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 00:21:47,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:47,202 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 00:21:47,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:21:47,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:47,403 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:47,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash 747162997, now seen corresponding path program 1 times [2024-10-24 00:21:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306430704] [2024-10-24 00:21:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:47,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683548481] [2024-10-24 00:21:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:47,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:47,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:47,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:21:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:47,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:21:47,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-24 00:21:47,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-24 00:21:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306430704] [2024-10-24 00:21:47,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683548481] [2024-10-24 00:21:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683548481] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 00:21:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:21:47,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-24 00:21:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669503942] [2024-10-24 00:21:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:47,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:21:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:21:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:21:47,681 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 00:21:49,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:21:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:49,233 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2024-10-24 00:21:49,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:21:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-24 00:21:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:49,239 INFO L225 Difference]: With dead ends: 145 [2024-10-24 00:21:49,241 INFO L226 Difference]: Without dead ends: 139 [2024-10-24 00:21:49,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:21:49,242 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:49,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-24 00:21:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-24 00:21:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2024-10-24 00:21:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 89 states have internal predecessors, (100), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-24 00:21:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2024-10-24 00:21:49,264 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 35 [2024-10-24 00:21:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:49,264 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2024-10-24 00:21:49,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 00:21:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2024-10-24 00:21:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-24 00:21:49,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:49,266 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:49,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 00:21:49,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:49,470 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:49,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash -244406458, now seen corresponding path program 1 times [2024-10-24 00:21:49,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407240628] [2024-10-24 00:21:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:49,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:21:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:21:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:21:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-24 00:21:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-24 00:21:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:21:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-24 00:21:49,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407240628] [2024-10-24 00:21:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407240628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:21:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:21:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:21:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379631299] [2024-10-24 00:21:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:21:49,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:21:49,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:21:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:21:49,647 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-24 00:21:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:49,706 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2024-10-24 00:21:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:21:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-10-24 00:21:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:49,709 INFO L225 Difference]: With dead ends: 136 [2024-10-24 00:21:49,710 INFO L226 Difference]: Without dead ends: 117 [2024-10-24 00:21:49,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:21:49,712 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:49,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:21:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-24 00:21:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-10-24 00:21:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 79 states have internal predecessors, (90), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-24 00:21:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2024-10-24 00:21:49,747 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 41 [2024-10-24 00:21:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:49,747 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2024-10-24 00:21:49,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-24 00:21:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2024-10-24 00:21:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-24 00:21:49,750 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:49,751 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:49,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 00:21:49,751 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:49,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2024-10-24 00:21:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121228702] [2024-10-24 00:21:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:21:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:21:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:21:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-24 00:21:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-24 00:21:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 00:21:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-24 00:21:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:21:49,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:49,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121228702] [2024-10-24 00:21:49,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121228702] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:21:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158008213] [2024-10-24 00:21:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:49,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:49,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:21:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:49,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:21:49,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-24 00:21:50,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-24 00:21:50,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158008213] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:50,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:21:50,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-24 00:21:50,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422970700] [2024-10-24 00:21:50,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:50,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 00:21:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:50,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 00:21:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:21:50,138 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-24 00:21:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:50,325 INFO L93 Difference]: Finished difference Result 240 states and 293 transitions. [2024-10-24 00:21:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:21:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 48 [2024-10-24 00:21:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:50,327 INFO L225 Difference]: With dead ends: 240 [2024-10-24 00:21:50,327 INFO L226 Difference]: Without dead ends: 219 [2024-10-24 00:21:50,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:21:50,328 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:50,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 145 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-10-24 00:21:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2024-10-24 00:21:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 137 states have (on average 1.197080291970803) internal successors, (164), 146 states have internal predecessors, (164), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-24 00:21:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 258 transitions. [2024-10-24 00:21:50,358 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 258 transitions. Word has length 48 [2024-10-24 00:21:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:50,360 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 258 transitions. [2024-10-24 00:21:50,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-24 00:21:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 258 transitions. [2024-10-24 00:21:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-24 00:21:50,362 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:50,362 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:50,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:21:50,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 00:21:50,565 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:50,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1450073182, now seen corresponding path program 1 times [2024-10-24 00:21:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:50,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227954048] [2024-10-24 00:21:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678055689] [2024-10-24 00:21:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:50,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:21:50,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:21:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:50,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 00:21:50,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-24 00:21:51,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-24 00:21:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227954048] [2024-10-24 00:21:52,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678055689] [2024-10-24 00:21:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678055689] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:52,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:21:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-24 00:21:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592176398] [2024-10-24 00:21:52,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:52,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:21:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:21:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:21:52,520 INFO L87 Difference]: Start difference. First operand 212 states and 258 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-24 00:21:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:53,317 INFO L93 Difference]: Finished difference Result 358 states and 459 transitions. [2024-10-24 00:21:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:21:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 57 [2024-10-24 00:21:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:53,320 INFO L225 Difference]: With dead ends: 358 [2024-10-24 00:21:53,321 INFO L226 Difference]: Without dead ends: 297 [2024-10-24 00:21:53,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:21:53,325 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:53,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 343 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:21:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-24 00:21:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 271. [2024-10-24 00:21:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 184 states have (on average 1.2282608695652173) internal successors, (226), 191 states have internal predecessors, (226), 57 states have call successors, (57), 29 states have call predecessors, (57), 29 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2024-10-24 00:21:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 338 transitions. [2024-10-24 00:21:53,416 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 338 transitions. Word has length 57 [2024-10-24 00:21:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:53,417 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 338 transitions. [2024-10-24 00:21:53,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-24 00:21:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 338 transitions. [2024-10-24 00:21:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-24 00:21:53,419 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:53,419 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:53,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 00:21:53,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:53,624 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:53,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1715906499, now seen corresponding path program 1 times [2024-10-24 00:21:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:53,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515027454] [2024-10-24 00:21:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:53,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55093562] [2024-10-24 00:21:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:53,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:53,664 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) [2024-10-24 00:21:53,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:21:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:53,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 00:21:53,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-24 00:21:54,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-24 00:21:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515027454] [2024-10-24 00:21:54,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55093562] [2024-10-24 00:21:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55093562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:54,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:21:54,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-10-24 00:21:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3525957] [2024-10-24 00:21:54,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:54,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:21:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:21:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:21:54,548 INFO L87 Difference]: Start difference. First operand 271 states and 338 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-24 00:21:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:55,167 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2024-10-24 00:21:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:21:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 68 [2024-10-24 00:21:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:55,170 INFO L225 Difference]: With dead ends: 338 [2024-10-24 00:21:55,170 INFO L226 Difference]: Without dead ends: 270 [2024-10-24 00:21:55,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:21:55,171 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:55,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 244 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:21:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-10-24 00:21:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2024-10-24 00:21:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 170 states have internal predecessors, (195), 47 states have call successors, (47), 30 states have call predecessors, (47), 29 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-24 00:21:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 287 transitions. [2024-10-24 00:21:55,219 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 287 transitions. Word has length 68 [2024-10-24 00:21:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:55,220 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 287 transitions. [2024-10-24 00:21:55,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-24 00:21:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 287 transitions. [2024-10-24 00:21:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 00:21:55,221 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:55,221 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:21:55,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 00:21:55,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:55,422 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:55,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 970851771, now seen corresponding path program 1 times [2024-10-24 00:21:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182972639] [2024-10-24 00:21:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:55,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:21:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:21:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:21:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-24 00:21:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-24 00:21:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 00:21:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-24 00:21:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-24 00:21:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-24 00:21:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 00:21:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 00:21:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-24 00:21:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:55,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182972639] [2024-10-24 00:21:55,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182972639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:21:55,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672065278] [2024-10-24 00:21:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:55,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:55,864 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) [2024-10-24 00:21:55,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:21:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:21:55,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:21:55,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-24 00:21:56,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-24 00:21:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672065278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:56,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:21:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-24 00:21:56,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053339767] [2024-10-24 00:21:56,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:56,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 00:21:56,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 00:21:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:21:56,533 INFO L87 Difference]: Start difference. First operand 242 states and 287 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-24 00:21:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:21:56,796 INFO L93 Difference]: Finished difference Result 280 states and 328 transitions. [2024-10-24 00:21:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 00:21:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 73 [2024-10-24 00:21:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:21:56,798 INFO L225 Difference]: With dead ends: 280 [2024-10-24 00:21:56,798 INFO L226 Difference]: Without dead ends: 214 [2024-10-24 00:21:56,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-24 00:21:56,799 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:21:56,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 256 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:21:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-10-24 00:21:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2024-10-24 00:21:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 146 states have internal predecessors, (165), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-24 00:21:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-10-24 00:21:56,847 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 73 [2024-10-24 00:21:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:21:56,848 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-10-24 00:21:56,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-24 00:21:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-10-24 00:21:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-24 00:21:56,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:21:56,849 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-24 00:21:56,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 00:21:57,050 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,SelfDestructingSolverStorable12 [2024-10-24 00:21:57,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:21:57,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:21:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1153550505, now seen corresponding path program 2 times [2024-10-24 00:21:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:21:57,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119591866] [2024-10-24 00:21:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:21:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:21:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:21:57,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165021394] [2024-10-24 00:21:57,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:21:57,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:21:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:21:57,081 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) [2024-10-24 00:21:57,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:21:57,146 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:21:57,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:21:57,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-24 00:21:57,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:21:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-24 00:21:57,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:22:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-24 00:22:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:22:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119591866] [2024-10-24 00:22:15,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:22:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165021394] [2024-10-24 00:22:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165021394] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:22:15,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:22:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-10-24 00:22:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393496503] [2024-10-24 00:22:15,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:22:15,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 00:22:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:22:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 00:22:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-10-24 00:22:15,924 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-24 00:22:29,981 WARN L286 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 218 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 00:22:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:22:30,831 INFO L93 Difference]: Finished difference Result 318 states and 403 transitions. [2024-10-24 00:22:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:22:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 89 [2024-10-24 00:22:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:22:30,835 INFO L225 Difference]: With dead ends: 318 [2024-10-24 00:22:30,836 INFO L226 Difference]: Without dead ends: 282 [2024-10-24 00:22:30,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-10-24 00:22:30,839 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 59 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:22:30,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 701 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-24 00:22:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-10-24 00:22:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 244. [2024-10-24 00:22:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 170 states have internal predecessors, (195), 49 states have call successors, (49), 28 states have call predecessors, (49), 28 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-10-24 00:22:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2024-10-24 00:22:30,909 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 89 [2024-10-24 00:22:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:22:30,909 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2024-10-24 00:22:30,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-24 00:22:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2024-10-24 00:22:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-24 00:22:30,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:22:30,911 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-24 00:22:30,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 00:22:31,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 00:22:31,112 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:22:31,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:22:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 531650401, now seen corresponding path program 3 times [2024-10-24 00:22:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:22:31,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159502361] [2024-10-24 00:22:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:31,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:22:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:22:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454630338] [2024-10-24 00:22:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:22:31,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:22:31,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:22:31,170 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) [2024-10-24 00:22:31,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 00:22:31,236 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 00:22:31,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:22:31,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 00:22:31,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:22:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-10-24 00:22:31,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:22:32,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:22:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159502361] [2024-10-24 00:22:32,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:22:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454630338] [2024-10-24 00:22:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454630338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:22:32,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:22:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-24 00:22:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696169632] [2024-10-24 00:22:32,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 00:22:32,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:22:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:22:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:22:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-24 00:22:32,434 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:22:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:22:32,607 INFO L93 Difference]: Finished difference Result 267 states and 313 transitions. [2024-10-24 00:22:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:22:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 94 [2024-10-24 00:22:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:22:32,610 INFO L225 Difference]: With dead ends: 267 [2024-10-24 00:22:32,610 INFO L226 Difference]: Without dead ends: 265 [2024-10-24 00:22:32,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:22:32,611 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:22:32,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:22:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-10-24 00:22:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2024-10-24 00:22:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 178 states have (on average 1.1629213483146068) internal successors, (207), 182 states have internal predecessors, (207), 49 states have call successors, (49), 32 states have call predecessors, (49), 32 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-10-24 00:22:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 304 transitions. [2024-10-24 00:22:32,678 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 304 transitions. Word has length 94 [2024-10-24 00:22:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:22:32,678 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 304 transitions. [2024-10-24 00:22:32,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-24 00:22:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 304 transitions. [2024-10-24 00:22:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-24 00:22:32,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:22:32,680 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:22:32,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 00:22:32,884 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,SelfDestructingSolverStorable14 [2024-10-24 00:22:32,885 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:22:32,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:22:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1792633709, now seen corresponding path program 1 times [2024-10-24 00:22:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:22:32,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887985847] [2024-10-24 00:22:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:32,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:22:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:22:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:22:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:22:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-24 00:22:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-24 00:22:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 00:22:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-24 00:22:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-24 00:22:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-24 00:22:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-24 00:22:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-24 00:22:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-24 00:22:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-24 00:22:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-24 00:22:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-24 00:22:33,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:22:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887985847] [2024-10-24 00:22:33,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887985847] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:22:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16723716] [2024-10-24 00:22:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:33,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:22:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:22:33,150 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) [2024-10-24 00:22:33,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 00:22:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:33,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:22:33,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:22:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-24 00:22:33,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:22:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-24 00:22:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16723716] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:22:33,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:22:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-24 00:22:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576143237] [2024-10-24 00:22:33,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:22:33,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:22:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:22:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:22:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:22:33,453 INFO L87 Difference]: Start difference. First operand 260 states and 304 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-24 00:22:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:22:33,918 INFO L93 Difference]: Finished difference Result 719 states and 883 transitions. [2024-10-24 00:22:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 00:22:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 95 [2024-10-24 00:22:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:22:33,923 INFO L225 Difference]: With dead ends: 719 [2024-10-24 00:22:33,923 INFO L226 Difference]: Without dead ends: 649 [2024-10-24 00:22:33,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-24 00:22:33,925 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:22:33,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 199 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:22:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-10-24 00:22:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 561. [2024-10-24 00:22:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 375 states have (on average 1.208) internal successors, (453), 393 states have internal predecessors, (453), 116 states have call successors, (116), 69 states have call predecessors, (116), 69 states have return successors, (112), 98 states have call predecessors, (112), 112 states have call successors, (112) [2024-10-24 00:22:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 681 transitions. [2024-10-24 00:22:34,119 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 681 transitions. Word has length 95 [2024-10-24 00:22:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:22:34,120 INFO L471 AbstractCegarLoop]: Abstraction has 561 states and 681 transitions. [2024-10-24 00:22:34,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-24 00:22:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 681 transitions. [2024-10-24 00:22:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-24 00:22:34,121 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:22:34,121 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 00:22:34,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 00:22:34,322 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,SelfDestructingSolverStorable15 [2024-10-24 00:22:34,322 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:22:34,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:22:34,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1998377320, now seen corresponding path program 2 times [2024-10-24 00:22:34,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:22:34,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470803900] [2024-10-24 00:22:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:34,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:22:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:22:34,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762774175] [2024-10-24 00:22:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:22:34,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:22:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:22:34,363 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) [2024-10-24 00:22:34,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 00:22:34,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:22:34,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:22:34,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-24 00:22:34,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:22:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-24 00:22:34,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:22:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-24 00:22:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:22:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470803900] [2024-10-24 00:22:37,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:22:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762774175] [2024-10-24 00:22:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762774175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:22:37,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:22:37,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-10-24 00:22:37,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103371196] [2024-10-24 00:22:37,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:22:37,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 00:22:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:22:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 00:22:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-10-24 00:22:37,567 INFO L87 Difference]: Start difference. First operand 561 states and 681 transitions. Second operand has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-24 00:22:44,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:49,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:52,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:22:52,486 INFO L93 Difference]: Finished difference Result 755 states and 946 transitions. [2024-10-24 00:22:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 00:22:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 100 [2024-10-24 00:22:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:22:52,492 INFO L225 Difference]: With dead ends: 755 [2024-10-24 00:22:52,492 INFO L226 Difference]: Without dead ends: 578 [2024-10-24 00:22:52,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 00:22:52,494 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 107 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:22:52,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 461 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 490 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2024-10-24 00:22:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-10-24 00:22:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 506. [2024-10-24 00:22:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 337 states have (on average 1.1928783382789319) internal successors, (402), 350 states have internal predecessors, (402), 105 states have call successors, (105), 64 states have call predecessors, (105), 63 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-24 00:22:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 608 transitions. [2024-10-24 00:22:52,675 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 608 transitions. Word has length 100 [2024-10-24 00:22:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:22:52,675 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 608 transitions. [2024-10-24 00:22:52,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-24 00:22:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 608 transitions. [2024-10-24 00:22:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-24 00:22:52,677 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:22:52,677 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:22:52,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 00:22:52,884 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,SelfDestructingSolverStorable16 [2024-10-24 00:22:52,884 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:22:52,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:22:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash 102666096, now seen corresponding path program 2 times [2024-10-24 00:22:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:22:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028350336] [2024-10-24 00:22:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:22:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:22:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 00:22:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:22:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-24 00:22:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-24 00:22:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 00:22:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,299 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-24 00:22:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-24 00:22:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-24 00:22:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-24 00:22:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-24 00:22:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-24 00:22:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-24 00:22:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-10-24 00:22:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-24 00:22:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-24 00:22:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:22:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-24 00:22:53,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:22:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028350336] [2024-10-24 00:22:53,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028350336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:22:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557986410] [2024-10-24 00:22:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:22:53,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:22:53,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:22:53,347 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) [2024-10-24 00:22:53,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 00:22:53,417 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:22:53,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:22:53,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 00:22:53,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:22:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-24 00:22:53,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:22:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-24 00:22:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557986410] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:22:54,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:22:54,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 23 [2024-10-24 00:22:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735456015] [2024-10-24 00:22:54,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:22:54,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 00:22:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:22:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 00:22:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:22:54,691 INFO L87 Difference]: Start difference. First operand 506 states and 608 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-10-24 00:22:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:22:55,292 INFO L93 Difference]: Finished difference Result 579 states and 721 transitions. [2024-10-24 00:22:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:22:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 105 [2024-10-24 00:22:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:22:55,298 INFO L225 Difference]: With dead ends: 579 [2024-10-24 00:22:55,299 INFO L226 Difference]: Without dead ends: 510 [2024-10-24 00:22:55,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2024-10-24 00:22:55,302 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:22:55,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 395 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:22:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-10-24 00:22:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 455. [2024-10-24 00:22:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 298 states have (on average 1.191275167785235) internal successors, (355), 319 states have internal predecessors, (355), 100 states have call successors, (100), 56 states have call predecessors, (100), 56 states have return successors, (94), 79 states have call predecessors, (94), 94 states have call successors, (94) [2024-10-24 00:22:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 549 transitions. [2024-10-24 00:22:55,519 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 549 transitions. Word has length 105 [2024-10-24 00:22:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:22:55,520 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 549 transitions. [2024-10-24 00:22:55,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-10-24 00:22:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 549 transitions. [2024-10-24 00:22:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-10-24 00:22:55,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:22:55,522 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-24 00:22:55,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-24 00:22:55,726 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,SelfDestructingSolverStorable17 [2024-10-24 00:22:55,727 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:22:55,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:22:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -349531392, now seen corresponding path program 4 times [2024-10-24 00:22:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:22:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974541847] [2024-10-24 00:22:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:22:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:22:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:22:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589351345] [2024-10-24 00:22:55,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:22:55,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:22:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:22:55,769 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) [2024-10-24 00:22:55,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 00:22:55,855 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:22:55,856 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:22:55,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-24 00:22:55,861 INFO L278 TraceCheckSpWp]: Computing forward predicates...