./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 9692f5b55a240b01d2d0c222255869fb052ffe02a605ab1c8e72ef46a070f8cd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:18:55,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:18:55,455 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:18:55,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:18:55,459 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:18:55,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:18:55,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:18:55,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:18:55,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:18:55,488 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:18:55,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:18:55,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:18:55,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:18:55,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:18:55,490 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:18:55,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:18:55,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:18:55,491 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:18:55,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:18:55,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:18:55,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:18:55,495 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:18:55,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:18:55,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:18:55,496 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:18:55,496 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:18:55,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:18:55,496 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:18:55,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:18:55,497 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:18:55,497 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:18:55,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:18:55,498 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:18:55,498 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:18:55,498 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:18:55,499 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:18:55,499 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9692f5b55a240b01d2d0c222255869fb052ffe02a605ab1c8e72ef46a070f8cd [2024-10-11 02:18:55,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:18:55,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:18:55,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:18:55,719 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:18:55,720 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:18:55,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c [2024-10-11 02:18:56,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:18:57,059 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:18:57,059 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c [2024-10-11 02:18:57,064 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a0b02f07/9283f7090b44459389a6aab0698e6264/FLAG0bb1ad9bf [2024-10-11 02:18:57,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a0b02f07/9283f7090b44459389a6aab0698e6264 [2024-10-11 02:18:57,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:18:57,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:18:57,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:18:57,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:18:57,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:18:57,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f677873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57, skipping insertion in model container [2024-10-11 02:18:57,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,505 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:18:57,644 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c[537,550] [2024-10-11 02:18:57,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:18:57,675 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:18:57,684 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound50.c[537,550] [2024-10-11 02:18:57,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:18:57,729 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:18:57,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57 WrapperNode [2024-10-11 02:18:57,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:18:57,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:18:57,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:18:57,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:18:57,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,754 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-11 02:18:57,755 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:18:57,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:18:57,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:18:57,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:18:57,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,764 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,779 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 02:18:57,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,786 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:18:57,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:18:57,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:18:57,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:18:57,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (1/1) ... [2024-10-11 02:18:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:18:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:18:57,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:18:57,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:18:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:18:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:18:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:18:57,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:18:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:18:57,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:18:57,911 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:18:57,913 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:18:58,068 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-11 02:18:58,069 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:18:58,095 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:18:58,095 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:18:58,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:18:58 BoogieIcfgContainer [2024-10-11 02:18:58,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:18:58,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:18:58,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:18:58,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:18:58,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:18:57" (1/3) ... [2024-10-11 02:18:58,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762a1c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:18:58, skipping insertion in model container [2024-10-11 02:18:58,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:18:57" (2/3) ... [2024-10-11 02:18:58,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762a1c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:18:58, skipping insertion in model container [2024-10-11 02:18:58,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:18:58" (3/3) ... [2024-10-11 02:18:58,105 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.c [2024-10-11 02:18:58,120 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:18:58,121 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:18:58,177 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:18:58,185 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;@751ba45d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:18:58,185 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:18:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:18:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 02:18:58,196 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:58,196 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:18:58,197 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:58,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 65649153, now seen corresponding path program 1 times [2024-10-11 02:18:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730953681] [2024-10-11 02:18:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:58,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:18:58,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:58,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730953681] [2024-10-11 02:18:58,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730953681] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:58,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:58,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:18:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904821596] [2024-10-11 02:18:58,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:58,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:18:58,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:18:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:18:58,341 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:58,365 INFO L93 Difference]: Finished difference Result 48 states and 82 transitions. [2024-10-11 02:18:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:18:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 02:18:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:58,372 INFO L225 Difference]: With dead ends: 48 [2024-10-11 02:18:58,372 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 02:18:58,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:18:58,377 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:18:58,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:18:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 02:18:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 02:18:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:18:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2024-10-11 02:18:58,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2024-10-11 02:18:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:58,414 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2024-10-11 02:18:58,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2024-10-11 02:18:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 02:18:58,415 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:58,415 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:18:58,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:18:58,416 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:58,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1205755883, now seen corresponding path program 1 times [2024-10-11 02:18:58,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:58,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666547148] [2024-10-11 02:18:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:18:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666547148] [2024-10-11 02:18:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666547148] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:18:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628545157] [2024-10-11 02:18:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:58,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:18:58,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:58,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:18:58,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:18:58,610 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:58,668 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-10-11 02:18:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:18:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 02:18:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:58,670 INFO L225 Difference]: With dead ends: 37 [2024-10-11 02:18:58,670 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 02:18:58,670 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 [2024-10-11 02:18:58,671 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 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 [2024-10-11 02:18:58,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:18:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 02:18:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-10-11 02:18:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:18:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-11 02:18:58,688 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2024-10-11 02:18:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:58,688 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-11 02:18:58,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-11 02:18:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 02:18:58,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:58,690 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:18:58,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:18:58,691 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:58,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:58,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2004332404, now seen corresponding path program 1 times [2024-10-11 02:18:58,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:58,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88820292] [2024-10-11 02:18:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:58,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:18:58,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:58,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88820292] [2024-10-11 02:18:58,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88820292] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:58,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:58,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 02:18:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521095869] [2024-10-11 02:18:58,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:58,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 02:18:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 02:18:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:18:58,769 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:58,801 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-10-11 02:18:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 02:18:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 02:18:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:58,806 INFO L225 Difference]: With dead ends: 43 [2024-10-11 02:18:58,806 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 02:18:58,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:18:58,809 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:18:58,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:18:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 02:18:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-11 02:18:58,818 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) [2024-10-11 02:18:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-10-11 02:18:58,819 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-10-11 02:18:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:58,820 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-10-11 02:18:58,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:18:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-10-11 02:18:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 02:18:58,820 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:58,820 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:18:58,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:18:58,821 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:58,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1962237034, now seen corresponding path program 1 times [2024-10-11 02:18:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267745556] [2024-10-11 02:18:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:58,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:18:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:18:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267745556] [2024-10-11 02:18:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267745556] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:18:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125545677] [2024-10-11 02:18:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:59,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:18:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:18:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:18:59,008 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:18:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:59,103 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-10-11 02:18:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:18:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (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 14 [2024-10-11 02:18:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:59,105 INFO L225 Difference]: With dead ends: 43 [2024-10-11 02:18:59,106 INFO L226 Difference]: Without dead ends: 41 [2024-10-11 02:18:59,106 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 [2024-10-11 02:18:59,107 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:18:59,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:18:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-11 02:18:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-10-11 02:18:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:18:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-11 02:18:59,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 14 [2024-10-11 02:18:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:59,116 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-11 02:18:59,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:18:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-11 02:18:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 02:18:59,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:59,117 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:18:59,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 02:18:59,118 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:59,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash 608183541, now seen corresponding path program 1 times [2024-10-11 02:18:59,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:59,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445472226] [2024-10-11 02:18:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:18:59,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569097914] [2024-10-11 02:18:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:59,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:18:59,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:18:59,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:18:59,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:18:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 02:18:59,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:18:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:18:59,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:18:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445472226] [2024-10-11 02:18:59,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:18:59,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569097914] [2024-10-11 02:18:59,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569097914] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:59,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:59,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 02:18:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122978492] [2024-10-11 02:18:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:59,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 02:18:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 02:18:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:18:59,389 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:18:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:59,500 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2024-10-11 02:18:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 02:18:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 19 [2024-10-11 02:18:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:59,502 INFO L225 Difference]: With dead ends: 62 [2024-10-11 02:18:59,502 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 02:18:59,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:18:59,503 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:18:59,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 120 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:18:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 02:18:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-11 02:18:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:18:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2024-10-11 02:18:59,513 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 19 [2024-10-11 02:18:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:59,514 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2024-10-11 02:18:59,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:18:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2024-10-11 02:18:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 02:18:59,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:59,515 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] [2024-10-11 02:18:59,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 02:18:59,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:18:59,716 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:59,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 560729168, now seen corresponding path program 1 times [2024-10-11 02:18:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:59,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476573519] [2024-10-11 02:18:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:18:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 02:18:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 02:18:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:18:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:18:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476573519] [2024-10-11 02:18:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476573519] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:18:59,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:18:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 02:18:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520683306] [2024-10-11 02:18:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:18:59,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:18:59,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:18:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:18:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:18:59,807 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-10-11 02:18:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:18:59,881 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-11 02:18:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 02:18:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 27 [2024-10-11 02:18:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:18:59,883 INFO L225 Difference]: With dead ends: 66 [2024-10-11 02:18:59,885 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 02:18:59,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:18:59,886 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:18:59,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:18:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 02:18:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-11 02:18:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 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) [2024-10-11 02:18:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-11 02:18:59,895 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-10-11 02:18:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:18:59,895 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-11 02:18:59,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-10-11 02:18:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-11 02:18:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 02:18:59,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:18:59,899 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] [2024-10-11 02:18:59,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 02:18:59,899 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:18:59,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:18:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash 562457046, now seen corresponding path program 1 times [2024-10-11 02:18:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:18:59,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939775320] [2024-10-11 02:18:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:18:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:18:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928075376] [2024-10-11 02:18:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:18:59,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:18:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:18:59,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:18:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:18:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:18:59,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 02:18:59,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:19:00,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:19:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:19:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939775320] [2024-10-11 02:19:00,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:19:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928075376] [2024-10-11 02:19:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928075376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:19:00,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:19:00,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-11 02:19:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679835530] [2024-10-11 02:19:00,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:19:00,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:19:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:19:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:19:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:19:00,444 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:19:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:19:01,040 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-11 02:19:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 02:19:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-10-11 02:19:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:19:01,041 INFO L225 Difference]: With dead ends: 66 [2024-10-11 02:19:01,041 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 02:19:01,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-10-11 02:19:01,042 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:19:01,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 141 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 02:19:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 02:19:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-11 02:19:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-11 02:19:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-10-11 02:19:01,053 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 27 [2024-10-11 02:19:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:19:01,054 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-10-11 02:19:01,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 02:19:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-10-11 02:19:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 02:19:01,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:19:01,056 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:19:01,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:19:01,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:01,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:19:01,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:19:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash 177821141, now seen corresponding path program 1 times [2024-10-11 02:19:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:19:01,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825363338] [2024-10-11 02:19:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:01,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:19:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:19:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 02:19:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 02:19:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:19:01,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:19:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825363338] [2024-10-11 02:19:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825363338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:19:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712917661] [2024-10-11 02:19:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:01,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:19:01,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:19:01,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:19:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 02:19:01,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:19:01,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:19:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 02:19:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712917661] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:19:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:19:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-11 02:19:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3846510] [2024-10-11 02:19:01,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:19:01,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:19:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:19:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:19:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:19:01,511 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 02:19:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:19:01,622 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2024-10-11 02:19:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:19:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 29 [2024-10-11 02:19:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:19:01,623 INFO L225 Difference]: With dead ends: 114 [2024-10-11 02:19:01,623 INFO L226 Difference]: Without dead ends: 100 [2024-10-11 02:19:01,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:19:01,624 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:19:01,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 148 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:19:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-11 02:19:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2024-10-11 02:19:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 63 states have internal predecessors, (73), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-11 02:19:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-10-11 02:19:01,635 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 29 [2024-10-11 02:19:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:19:01,636 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-10-11 02:19:01,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 02:19:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-10-11 02:19:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 02:19:01,636 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:19:01,637 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:19:01,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 02:19:01,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:01,838 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:19:01,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:19:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1560293058, now seen corresponding path program 1 times [2024-10-11 02:19:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:19:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027186891] [2024-10-11 02:19:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:19:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:19:01,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221056152] [2024-10-11 02:19:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:19:01,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:19:01,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:19:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:01,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:19:01,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:19:02,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:19:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:19:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:19:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027186891] [2024-10-11 02:19:02,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:19:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221056152] [2024-10-11 02:19:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221056152] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:19:02,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:19:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-10-11 02:19:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439516337] [2024-10-11 02:19:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:19:02,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 02:19:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:19:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 02:19:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:19:02,155 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 02:19:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:19:02,589 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2024-10-11 02:19:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:19:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2024-10-11 02:19:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:19:02,590 INFO L225 Difference]: With dead ends: 113 [2024-10-11 02:19:02,590 INFO L226 Difference]: Without dead ends: 111 [2024-10-11 02:19:02,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-11 02:19:02,591 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:19:02,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 89 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:19:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-11 02:19:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-10-11 02:19:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-10-11 02:19:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2024-10-11 02:19:02,611 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 37 [2024-10-11 02:19:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:19:02,611 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2024-10-11 02:19:02,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 02:19:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2024-10-11 02:19:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 02:19:02,612 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:19:02,612 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:19:02,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:19:02,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 02:19:02,815 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:19:02,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:19:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1287430247, now seen corresponding path program 1 times [2024-10-11 02:19:02,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:19:02,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385108711] [2024-10-11 02:19:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:02,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:19:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-11 02:19:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 02:19:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 02:19:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:19:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 02:19:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-11 02:19:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:19:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:19:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385108711] [2024-10-11 02:19:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385108711] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:19:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737471787] [2024-10-11 02:19:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:02,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:19:02,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:19:02,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:19:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:02,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:19:02,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:19:03,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:19:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:19:03,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737471787] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:19:03,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:19:03,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-11 02:19:03,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889226319] [2024-10-11 02:19:03,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:19:03,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 02:19:03,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:19:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 02:19:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:19:03,126 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-11 02:19:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:19:03,303 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions. [2024-10-11 02:19:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:19:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 45 [2024-10-11 02:19:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:19:03,306 INFO L225 Difference]: With dead ends: 198 [2024-10-11 02:19:03,306 INFO L226 Difference]: Without dead ends: 184 [2024-10-11 02:19:03,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:19:03,307 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:19:03,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 146 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:19:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-11 02:19:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2024-10-11 02:19:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 121 states have internal predecessors, (135), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 02:19:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2024-10-11 02:19:03,337 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 45 [2024-10-11 02:19:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:19:03,337 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2024-10-11 02:19:03,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-10-11 02:19:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2024-10-11 02:19:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 02:19:03,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:19:03,340 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:19:03,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:19:03,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 02:19:03,540 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:19:03,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:19:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1285702369, now seen corresponding path program 1 times [2024-10-11 02:19:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:19:03,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145806035] [2024-10-11 02:19:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:19:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:19:03,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986429033] [2024-10-11 02:19:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:03,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:19:03,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:19:03,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:19:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:03,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 02:19:03,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 02:19:03,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:19:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 02:19:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:19:09,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145806035] [2024-10-11 02:19:09,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:19:09,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986429033] [2024-10-11 02:19:09,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986429033] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:19:09,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:19:09,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-10-11 02:19:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383296223] [2024-10-11 02:19:09,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:19:09,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 02:19:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:19:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 02:19:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2024-10-11 02:19:09,499 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 02:19:13,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-11 02:19:17,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-11 02:19:21,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-11 02:19:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:19:22,336 INFO L93 Difference]: Finished difference Result 241 states and 300 transitions. [2024-10-11 02:19:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 02:19:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2024-10-11 02:19:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:19:22,338 INFO L225 Difference]: With dead ends: 241 [2024-10-11 02:19:22,338 INFO L226 Difference]: Without dead ends: 237 [2024-10-11 02:19:22,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=92, Invalid=369, Unknown=1, NotChecked=0, Total=462 [2024-10-11 02:19:22,339 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-10-11 02:19:22,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 205 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 184 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2024-10-11 02:19:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-10-11 02:19:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 222. [2024-10-11 02:19:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 145 states have (on average 1.193103448275862) internal successors, (173), 156 states have internal predecessors, (173), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2024-10-11 02:19:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 271 transitions. [2024-10-11 02:19:22,375 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 271 transitions. Word has length 45 [2024-10-11 02:19:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:19:22,376 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 271 transitions. [2024-10-11 02:19:22,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 02:19:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 271 transitions. [2024-10-11 02:19:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 02:19:22,378 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:19:22,379 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] [2024-10-11 02:19:22,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:19:22,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:19:22,579 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:19:22,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:19:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash -293585845, now seen corresponding path program 1 times [2024-10-11 02:19:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:19:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088763751] [2024-10-11 02:19:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:19:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:19:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134171244] [2024-10-11 02:19:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:19:22,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:19:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:19:22,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:19:22,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:19:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:19:26,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 02:19:26,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:19:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-10-11 02:19:27,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:11,348 WARN L286 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-11 02:20:26,257 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-11 02:20:31,777 WARN L286 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)