./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.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 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:12:33,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:12:33,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:12:33,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:12:33,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:12:33,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:12:33,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:12:33,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:12:33,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:12:33,426 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:12:33,427 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:12:33,427 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:12:33,428 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:12:33,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:12:33,429 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:12:33,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:12:33,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:12:33,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:12:33,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:12:33,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:12:33,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:12:33,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:12:33,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:12:33,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:12:33,437 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:12:33,437 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:12:33,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:12:33,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:12:33,438 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:12:33,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:12:33,438 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:12:33,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:12:33,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:12:33,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:12:33,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:12:33,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:12:33,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:12:33,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:12:33,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:12:33,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:12:33,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:12:33,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:12:33,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe [2024-11-16 07:12:33,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:12:33,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:12:33,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:12:33,746 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:12:33,746 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:12:33,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2024-11-16 07:12:35,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:12:35,373 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:12:35,374 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2024-11-16 07:12:35,383 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41cc88f77/065ab2de1cf64793b490f59ed976b609/FLAG3933efc27 [2024-11-16 07:12:35,398 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41cc88f77/065ab2de1cf64793b490f59ed976b609 [2024-11-16 07:12:35,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:12:35,403 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:12:35,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:12:35,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:12:35,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:12:35,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407d7855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35, skipping insertion in model container [2024-11-16 07:12:35,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,433 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:12:35,617 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2024-11-16 07:12:35,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:12:35,656 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:12:35,667 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2024-11-16 07:12:35,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:12:35,696 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:12:35,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35 WrapperNode [2024-11-16 07:12:35,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:12:35,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:12:35,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:12:35,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:12:35,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,733 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-16 07:12:35,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:12:35,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:12:35,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:12:35,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:12:35,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,748 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,771 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 07:12:35,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,776 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:12:35,788 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:12:35,789 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:12:35,789 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:12:35,790 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (1/1) ... [2024-11-16 07:12:35,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:12:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:35,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 07:12:35,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 07:12:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:12:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:12:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:12:35,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:12:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 07:12:35,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 07:12:35,927 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:12:35,929 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:12:36,080 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-16 07:12:36,081 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:12:36,099 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:12:36,100 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:12:36,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:12:36 BoogieIcfgContainer [2024-11-16 07:12:36,100 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:12:36,102 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:12:36,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:12:36,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:12:36,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:12:35" (1/3) ... [2024-11-16 07:12:36,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fd90e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:12:36, skipping insertion in model container [2024-11-16 07:12:36,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:12:35" (2/3) ... [2024-11-16 07:12:36,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fd90e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:12:36, skipping insertion in model container [2024-11-16 07:12:36,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:12:36" (3/3) ... [2024-11-16 07:12:36,111 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2024-11-16 07:12:36,131 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:12:36,132 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:12:36,194 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:12:36,200 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;@3c8c839c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:12:36,201 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:12:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2024-11-16 07:12:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:12:36,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:36,218 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:36,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:36,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash -292126860, now seen corresponding path program 1 times [2024-11-16 07:12:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985988727] [2024-11-16 07:12:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:12:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:36,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985988727] [2024-11-16 07:12:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985988727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 07:12:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154629040] [2024-11-16 07:12:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:36,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 07:12:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 07:12:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:12:36,403 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:36,427 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2024-11-16 07:12:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 07:12:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 07:12:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:36,438 INFO L225 Difference]: With dead ends: 55 [2024-11-16 07:12:36,438 INFO L226 Difference]: Without dead ends: 25 [2024-11-16 07:12:36,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:12:36,444 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:36,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-16 07:12:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-16 07:12:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-11-16 07:12:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2024-11-16 07:12:36,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2024-11-16 07:12:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:36,477 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2024-11-16 07:12:36,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2024-11-16 07:12:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:12:36,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:36,479 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:36,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:12:36,479 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:36,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2099581323, now seen corresponding path program 1 times [2024-11-16 07:12:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:36,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099597567] [2024-11-16 07:12:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:36,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:12:36,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099597567] [2024-11-16 07:12:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099597567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:36,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:36,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:12:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104870030] [2024-11-16 07:12:36,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:36,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:36,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:36,695 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:36,760 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-11-16 07:12:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:36,761 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 07:12:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:36,762 INFO L225 Difference]: With dead ends: 40 [2024-11-16 07:12:36,762 INFO L226 Difference]: Without dead ends: 37 [2024-11-16 07:12:36,763 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:36,764 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:36,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-16 07:12:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-16 07:12:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-11-16 07:12:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-16 07:12:36,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-11-16 07:12:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:36,778 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-16 07:12:36,778 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-16 07:12:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 07:12:36,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:36,779 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:36,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 07:12:36,779 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:36,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -909958482, now seen corresponding path program 1 times [2024-11-16 07:12:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422830788] [2024-11-16 07:12:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:12:36,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:36,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422830788] [2024-11-16 07:12:36,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422830788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:36,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:36,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 07:12:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396564923] [2024-11-16 07:12:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:36,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 07:12:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 07:12:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 07:12:36,863 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:36,887 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2024-11-16 07:12:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 07:12:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2024-11-16 07:12:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:36,890 INFO L225 Difference]: With dead ends: 46 [2024-11-16 07:12:36,890 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 07:12:36,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 07:12:36,891 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:36,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 07:12:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-16 07:12:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-11-16 07:12:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-16 07:12:36,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 13 [2024-11-16 07:12:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:36,906 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-16 07:12:36,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:12:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-16 07:12:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 07:12:36,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:36,907 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:36,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 07:12:36,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:36,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2100820203, now seen corresponding path program 1 times [2024-11-16 07:12:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:36,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083437396] [2024-11-16 07:12:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:36,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:12:37,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083437396] [2024-11-16 07:12:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083437396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:37,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:12:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686990593] [2024-11-16 07:12:37,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:37,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:37,091 INFO L87 Difference]: Start difference. First operand 31 states and 40 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:12:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:37,160 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-16 07:12:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:37,161 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, (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 16 [2024-11-16 07:12:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:37,162 INFO L225 Difference]: With dead ends: 46 [2024-11-16 07:12:37,166 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 07:12:37,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:37,168 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:37,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 07:12:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2024-11-16 07:12:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-16 07:12:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-16 07:12:37,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 16 [2024-11-16 07:12:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:37,179 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-16 07:12:37,179 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:12:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-16 07:12:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 07:12:37,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:37,181 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:37,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 07:12:37,182 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:37,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1262954485, now seen corresponding path program 1 times [2024-11-16 07:12:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090867234] [2024-11-16 07:12:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:37,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470077511] [2024-11-16 07:12:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:37,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:37,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 07:12:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:12:37,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 07:12:37,383 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:12:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090867234] [2024-11-16 07:12:37,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:12:37,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470077511] [2024-11-16 07:12:37,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470077511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:37,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:37,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:12:37,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818308089] [2024-11-16 07:12:37,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:37,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:37,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:37,390 INFO L87 Difference]: Start difference. First operand 35 states and 43 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, (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) [2024-11-16 07:12:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:37,480 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-16 07:12:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:37,485 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, (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 21 [2024-11-16 07:12:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:37,486 INFO L225 Difference]: With dead ends: 65 [2024-11-16 07:12:37,486 INFO L226 Difference]: Without dead ends: 49 [2024-11-16 07:12:37,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:37,487 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:37,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-16 07:12:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-16 07:12:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 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) [2024-11-16 07:12:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-11-16 07:12:37,496 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 21 [2024-11-16 07:12:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:37,497 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-11-16 07:12:37,497 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, (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) [2024-11-16 07:12:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-11-16 07:12:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 07:12:37,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:37,498 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:37,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:37,698 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 [2024-11-16 07:12:37,699 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:37,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:37,699 INFO L85 PathProgramCache]: Analyzing trace with hash -55756711, now seen corresponding path program 1 times [2024-11-16 07:12:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:37,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349421416] [2024-11-16 07:12:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 07:12:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349421416] [2024-11-16 07:12:37,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349421416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:37,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:12:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019901266] [2024-11-16 07:12:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:37,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:37,791 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-11-16 07:12:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:37,834 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-11-16 07:12:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:37,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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 29 [2024-11-16 07:12:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:37,836 INFO L225 Difference]: With dead ends: 69 [2024-11-16 07:12:37,838 INFO L226 Difference]: Without dead ends: 61 [2024-11-16 07:12:37,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:37,839 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:37,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 96 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-16 07:12:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-16 07:12:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-16 07:12:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-16 07:12:37,859 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 29 [2024-11-16 07:12:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:37,861 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-16 07:12:37,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-11-16 07:12:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-16 07:12:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 07:12:37,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:37,862 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:37,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 07:12:37,863 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:37,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash -23433476, now seen corresponding path program 1 times [2024-11-16 07:12:37,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:37,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441169510] [2024-11-16 07:12:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:37,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:37,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282650959] [2024-11-16 07:12:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:37,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:37,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 07:12:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:37,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 07:12:37,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 07:12:38,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 07:12:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441169510] [2024-11-16 07:12:38,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:12:38,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282650959] [2024-11-16 07:12:38,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282650959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:38,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:12:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-16 07:12:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660632841] [2024-11-16 07:12:38,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:38,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:12:38,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:12:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:12:38,384 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-11-16 07:12:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:38,514 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2024-11-16 07:12:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 07:12:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 29 [2024-11-16 07:12:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:38,517 INFO L225 Difference]: With dead ends: 79 [2024-11-16 07:12:38,517 INFO L226 Difference]: Without dead ends: 76 [2024-11-16 07:12:38,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:12:38,518 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:38,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-16 07:12:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-11-16 07:12:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 49 states have internal predecessors, (57), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-16 07:12:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-16 07:12:38,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2024-11-16 07:12:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:38,534 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-16 07:12:38,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-11-16 07:12:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-16 07:12:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 07:12:38,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:38,537 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, 1, 1, 1, 1] [2024-11-16 07:12:38,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:38,741 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,SelfDestructingSolverStorable6 [2024-11-16 07:12:38,742 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:38,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 646966983, now seen corresponding path program 1 times [2024-11-16 07:12:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608770149] [2024-11-16 07:12:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-16 07:12:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:12:38,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608770149] [2024-11-16 07:12:38,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608770149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410731169] [2024-11-16 07:12:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:38,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:38,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:38,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 07:12:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:38,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 07:12:38,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 07:12:38,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 07:12:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410731169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:39,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:12:39,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-16 07:12:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575806448] [2024-11-16 07:12:39,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:39,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 07:12:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 07:12:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:12:39,026 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2024-11-16 07:12:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:39,168 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2024-11-16 07:12:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:12:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 36 [2024-11-16 07:12:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:39,170 INFO L225 Difference]: With dead ends: 161 [2024-11-16 07:12:39,170 INFO L226 Difference]: Without dead ends: 135 [2024-11-16 07:12:39,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:12:39,171 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:39,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 166 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-16 07:12:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2024-11-16 07:12:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 86 states have internal predecessors, (98), 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) [2024-11-16 07:12:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2024-11-16 07:12:39,193 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 36 [2024-11-16 07:12:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:39,194 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2024-11-16 07:12:39,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2024-11-16 07:12:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2024-11-16 07:12:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 07:12:39,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:39,195 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:39,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:39,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:39,396 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:39,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash 253378592, now seen corresponding path program 1 times [2024-11-16 07:12:39,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177248056] [2024-11-16 07:12:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644132221] [2024-11-16 07:12:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:39,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:39,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:39,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 07:12:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:39,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 07:12:39,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 07:12:39,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 07:12:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177248056] [2024-11-16 07:12:39,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:12:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644132221] [2024-11-16 07:12:39,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644132221] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:39,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:12:39,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-16 07:12:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804651179] [2024-11-16 07:12:39,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:39,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 07:12:39,683 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-16 07:12:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:39,811 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2024-11-16 07:12:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 39 [2024-11-16 07:12:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:39,815 INFO L225 Difference]: With dead ends: 150 [2024-11-16 07:12:39,815 INFO L226 Difference]: Without dead ends: 143 [2024-11-16 07:12:39,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:12:39,817 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:39,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-16 07:12:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2024-11-16 07:12:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 93 states have internal predecessors, (104), 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) [2024-11-16 07:12:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2024-11-16 07:12:39,858 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 39 [2024-11-16 07:12:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:39,858 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2024-11-16 07:12:39,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-16 07:12:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2024-11-16 07:12:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-16 07:12:39,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:39,861 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, 1, 1, 1, 1] [2024-11-16 07:12:39,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:40,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:40,066 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:40,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1361005644, now seen corresponding path program 1 times [2024-11-16 07:12:40,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:40,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834653091] [2024-11-16 07:12:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 07:12:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 07:12:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834653091] [2024-11-16 07:12:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834653091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:40,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:12:40,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:12:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402836619] [2024-11-16 07:12:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:40,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:40,233 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-16 07:12:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:40,292 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-11-16 07:12:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 45 [2024-11-16 07:12:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:40,294 INFO L225 Difference]: With dead ends: 141 [2024-11-16 07:12:40,294 INFO L226 Difference]: Without dead ends: 121 [2024-11-16 07:12:40,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:40,295 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:40,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-16 07:12:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-11-16 07:12:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 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) [2024-11-16 07:12:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2024-11-16 07:12:40,325 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 45 [2024-11-16 07:12:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:40,325 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2024-11-16 07:12:40,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-16 07:12:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2024-11-16 07:12:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-16 07:12:40,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:40,329 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, 1, 1, 1, 1] [2024-11-16 07:12:40,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 07:12:40,329 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:40,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:40,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1645453820, now seen corresponding path program 1 times [2024-11-16 07:12:40,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:40,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124932955] [2024-11-16 07:12:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:12:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:12:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-16 07:12:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124932955] [2024-11-16 07:12:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124932955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054601140] [2024-11-16 07:12:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:40,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:40,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 07:12:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:40,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:12:40,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 07:12:40,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-16 07:12:40,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054601140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:40,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:12:40,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2024-11-16 07:12:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897534120] [2024-11-16 07:12:40,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:40,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 07:12:40,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 07:12:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-16 07:12:40,636 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2024-11-16 07:12:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:40,771 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2024-11-16 07:12:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:12:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 52 [2024-11-16 07:12:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:40,773 INFO L225 Difference]: With dead ends: 200 [2024-11-16 07:12:40,773 INFO L226 Difference]: Without dead ends: 178 [2024-11-16 07:12:40,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-16 07:12:40,774 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:40,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 145 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-16 07:12:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-16 07:12:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.176991150442478) internal successors, (133), 119 states have internal predecessors, (133), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-16 07:12:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2024-11-16 07:12:40,805 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 52 [2024-11-16 07:12:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:40,805 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2024-11-16 07:12:40,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2024-11-16 07:12:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2024-11-16 07:12:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-16 07:12:40,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:40,808 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, 1, 1, 1, 1] [2024-11-16 07:12:40,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:41,009 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,SelfDestructingSolverStorable10 [2024-11-16 07:12:41,010 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:41,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -646613615, now seen corresponding path program 1 times [2024-11-16 07:12:41,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564304260] [2024-11-16 07:12:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:41,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060134174] [2024-11-16 07:12:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:41,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:41,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:41,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 07:12:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:41,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 07:12:41,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-16 07:12:41,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-16 07:12:43,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564304260] [2024-11-16 07:12:43,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:12:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060134174] [2024-11-16 07:12:43,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060134174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:43,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:12:43,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-16 07:12:43,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100811867] [2024-11-16 07:12:43,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:43,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 07:12:43,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 07:12:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-16 07:12:43,847 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-16 07:12:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:45,151 INFO L93 Difference]: Finished difference Result 285 states and 363 transitions. [2024-11-16 07:12:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 07:12:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 61 [2024-11-16 07:12:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:45,156 INFO L225 Difference]: With dead ends: 285 [2024-11-16 07:12:45,156 INFO L226 Difference]: Without dead ends: 231 [2024-11-16 07:12:45,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-16 07:12:45,158 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:45,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 370 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 07:12:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-16 07:12:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 199. [2024-11-16 07:12:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 141 states have internal predecessors, (160), 39 states have call successors, (39), 24 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-16 07:12:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2024-11-16 07:12:45,203 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 61 [2024-11-16 07:12:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:45,204 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2024-11-16 07:12:45,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-16 07:12:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2024-11-16 07:12:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-16 07:12:45,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:45,206 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, 1, 1, 1, 1] [2024-11-16 07:12:45,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:45,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:45,407 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:45,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash -641848553, now seen corresponding path program 1 times [2024-11-16 07:12:45,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:45,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681928014] [2024-11-16 07:12:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335341589] [2024-11-16 07:12:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:45,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:45,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:45,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 07:12:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:45,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 07:12:45,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-16 07:12:46,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-16 07:12:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681928014] [2024-11-16 07:12:46,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:12:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335341589] [2024-11-16 07:12:46,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335341589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:46,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:12:46,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-16 07:12:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447963099] [2024-11-16 07:12:46,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:46,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 07:12:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 07:12:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-16 07:12:46,847 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-16 07:12:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:47,573 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2024-11-16 07:12:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 07:12:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 72 [2024-11-16 07:12:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:47,576 INFO L225 Difference]: With dead ends: 290 [2024-11-16 07:12:47,578 INFO L226 Difference]: Without dead ends: 248 [2024-11-16 07:12:47,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-11-16 07:12:47,579 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:47,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 529 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 07:12:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-16 07:12:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2024-11-16 07:12:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 146 states have internal predecessors, (171), 42 states have call successors, (42), 25 states have call predecessors, (42), 24 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-16 07:12:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 253 transitions. [2024-11-16 07:12:47,625 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 253 transitions. Word has length 72 [2024-11-16 07:12:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:47,626 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 253 transitions. [2024-11-16 07:12:47,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-16 07:12:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 253 transitions. [2024-11-16 07:12:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-16 07:12:47,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:47,628 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:47,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 07:12:47,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:47,833 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:47,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1711473285, now seen corresponding path program 2 times [2024-11-16 07:12:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:47,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022593794] [2024-11-16 07:12:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:47,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:47,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:47,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:12:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:12:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:12:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-16 07:12:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-16 07:12:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-16 07:12:48,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:48,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022593794] [2024-11-16 07:12:48,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022593794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:48,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473571874] [2024-11-16 07:12:48,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:12:48,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:48,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:48,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 07:12:48,086 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:12:48,086 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:12:48,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:12:48,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-16 07:12:48,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-16 07:12:48,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473571874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:48,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:12:48,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-16 07:12:48,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855750822] [2024-11-16 07:12:48,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:48,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:48,212 INFO L87 Difference]: Start difference. First operand 210 states and 253 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-16 07:12:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:48,291 INFO L93 Difference]: Finished difference Result 235 states and 287 transitions. [2024-11-16 07:12:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 07:12:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 75 [2024-11-16 07:12:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:48,294 INFO L225 Difference]: With dead ends: 235 [2024-11-16 07:12:48,294 INFO L226 Difference]: Without dead ends: 205 [2024-11-16 07:12:48,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:12:48,294 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:48,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-16 07:12:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-16 07:12:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 141 states have internal predecessors, (164), 42 states have call successors, (42), 25 states have call predecessors, (42), 24 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-16 07:12:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 246 transitions. [2024-11-16 07:12:48,336 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 246 transitions. Word has length 75 [2024-11-16 07:12:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:48,336 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 246 transitions. [2024-11-16 07:12:48,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-16 07:12:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 246 transitions. [2024-11-16 07:12:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 07:12:48,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:48,337 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, 1, 1, 1, 1] [2024-11-16 07:12:48,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 07:12:48,538 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,SelfDestructingSolverStorable13 [2024-11-16 07:12:48,538 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:48,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1640886345, now seen corresponding path program 1 times [2024-11-16 07:12:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:48,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791590450] [2024-11-16 07:12:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:12:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:12:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:12:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-16 07:12:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-16 07:12:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-16 07:12:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-16 07:12:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791590450] [2024-11-16 07:12:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791590450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733608151] [2024-11-16 07:12:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:48,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:48,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:48,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:48,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 07:12:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:48,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 07:12:48,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-16 07:12:49,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-16 07:12:49,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733608151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:49,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:12:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-16 07:12:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016400124] [2024-11-16 07:12:49,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:49,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 07:12:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 07:12:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-16 07:12:49,630 INFO L87 Difference]: Start difference. First operand 205 states and 246 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-16 07:12:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:49,910 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2024-11-16 07:12:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 07:12:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 77 [2024-11-16 07:12:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:49,912 INFO L225 Difference]: With dead ends: 220 [2024-11-16 07:12:49,912 INFO L226 Difference]: Without dead ends: 194 [2024-11-16 07:12:49,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-16 07:12:49,914 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:49,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 377 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 07:12:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-16 07:12:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2024-11-16 07:12:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.2) internal successors, (150), 128 states have internal predecessors, (150), 38 states have call successors, (38), 23 states have call predecessors, (38), 22 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-16 07:12:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2024-11-16 07:12:49,951 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 77 [2024-11-16 07:12:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:49,951 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2024-11-16 07:12:49,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-16 07:12:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2024-11-16 07:12:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-16 07:12:49,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:49,953 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:49,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 07:12:50,153 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,SelfDestructingSolverStorable14 [2024-11-16 07:12:50,154 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:50,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1787073206, now seen corresponding path program 1 times [2024-11-16 07:12:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:50,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416921029] [2024-11-16 07:12:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:12:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:12:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:12:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-16 07:12:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-16 07:12:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-16 07:12:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-16 07:12:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-16 07:12:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416921029] [2024-11-16 07:12:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416921029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737643566] [2024-11-16 07:12:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:50,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:50,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 07:12:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 07:12:50,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-16 07:12:50,361 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:12:50,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737643566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:12:50,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:12:50,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-16 07:12:50,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676899989] [2024-11-16 07:12:50,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:12:50,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:12:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:12:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:50,363 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 07:12:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:50,458 INFO L93 Difference]: Finished difference Result 208 states and 251 transitions. [2024-11-16 07:12:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:12:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 81 [2024-11-16 07:12:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:50,461 INFO L225 Difference]: With dead ends: 208 [2024-11-16 07:12:50,461 INFO L226 Difference]: Without dead ends: 187 [2024-11-16 07:12:50,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:12:50,462 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:50,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:12:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-16 07:12:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2024-11-16 07:12:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-16 07:12:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2024-11-16 07:12:50,499 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 81 [2024-11-16 07:12:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:50,499 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2024-11-16 07:12:50,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-16 07:12:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2024-11-16 07:12:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-16 07:12:50,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:50,500 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:50,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 07:12:50,704 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,SelfDestructingSolverStorable15 [2024-11-16 07:12:50,705 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:50,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1894266266, now seen corresponding path program 2 times [2024-11-16 07:12:50,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:50,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234498947] [2024-11-16 07:12:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:50,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:12:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:12:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:12:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:12:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:12:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:12:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:12:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:12:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-16 07:12:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-16 07:12:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-16 07:12:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-16 07:12:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-11-16 07:12:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-16 07:12:50,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:12:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234498947] [2024-11-16 07:12:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234498947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:12:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229128099] [2024-11-16 07:12:50,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:12:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:50,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:50,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 07:12:50,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:12:50,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:12:50,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 07:12:50,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 07:12:51,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:12:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-16 07:12:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229128099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:12:51,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:12:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2024-11-16 07:12:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106425099] [2024-11-16 07:12:51,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:12:51,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 07:12:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:12:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 07:12:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:12:51,125 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-16 07:12:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:12:51,246 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2024-11-16 07:12:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 07:12:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 90 [2024-11-16 07:12:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:12:51,248 INFO L225 Difference]: With dead ends: 250 [2024-11-16 07:12:51,248 INFO L226 Difference]: Without dead ends: 181 [2024-11-16 07:12:51,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-16 07:12:51,249 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:12:51,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:12:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-16 07:12:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-16 07:12:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 123 states have (on average 1.170731707317073) internal successors, (144), 125 states have internal predecessors, (144), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-16 07:12:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2024-11-16 07:12:51,285 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 90 [2024-11-16 07:12:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:12:51,285 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2024-11-16 07:12:51,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-16 07:12:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2024-11-16 07:12:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-16 07:12:51,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:12:51,287 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:12:51,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 07:12:51,491 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,SelfDestructingSolverStorable16 [2024-11-16 07:12:51,492 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:12:51,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:12:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash 952840387, now seen corresponding path program 1 times [2024-11-16 07:12:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:12:51,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769546334] [2024-11-16 07:12:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:12:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:12:51,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838730261] [2024-11-16 07:12:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:12:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:12:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:12:51,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:12:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 07:12:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:12:51,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-16 07:12:51,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:12:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-16 07:12:52,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:13:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-16 07:13:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:13:37,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769546334] [2024-11-16 07:13:37,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:13:37,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838730261] [2024-11-16 07:13:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838730261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:13:37,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:13:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-16 07:13:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219333150] [2024-11-16 07:13:37,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:13:37,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 07:13:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:13:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 07:13:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-16 07:13:37,908 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-16 07:13:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:13:41,967 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2024-11-16 07:13:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 07:13:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 93 [2024-11-16 07:13:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:13:41,969 INFO L225 Difference]: With dead ends: 242 [2024-11-16 07:13:41,969 INFO L226 Difference]: Without dead ends: 217 [2024-11-16 07:13:41,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-11-16 07:13:41,970 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:13:41,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 472 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-16 07:13:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-16 07:13:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 193. [2024-11-16 07:13:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 133 states have internal predecessors, (154), 41 states have call successors, (41), 21 states have call predecessors, (41), 21 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-16 07:13:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2024-11-16 07:13:42,026 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 93 [2024-11-16 07:13:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:13:42,027 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2024-11-16 07:13:42,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-16 07:13:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2024-11-16 07:13:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-16 07:13:42,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:13:42,028 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, 1, 1, 1, 1] [2024-11-16 07:13:42,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 07:13:42,232 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,SelfDestructingSolverStorable17 [2024-11-16 07:13:42,233 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:13:42,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:13:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 985163622, now seen corresponding path program 3 times [2024-11-16 07:13:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:13:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372738620] [2024-11-16 07:13:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:13:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:13:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:13:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 07:13:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 07:13:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 07:13:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 07:13:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 07:13:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-16 07:13:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-16 07:13:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-16 07:13:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-16 07:13:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-16 07:13:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-16 07:13:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-16 07:13:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:13:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-16 07:13:42,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:13:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372738620] [2024-11-16 07:13:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372738620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:13:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849599537] [2024-11-16 07:13:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:13:42,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:13:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:13:42,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 07:13:42,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 07:13:42,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 07:13:42,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:13:42,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 07:13:42,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:13:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-16 07:13:43,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:13:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-16 07:13:59,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849599537] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:13:59,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:13:59,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 12] total 30 [2024-11-16 07:13:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894131804] [2024-11-16 07:13:59,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:13:59,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 07:13:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:13:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 07:13:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-16 07:13:59,242 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 17 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39)