./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:49:23,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:49:23,684 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:49:23,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:49:23,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:49:23,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:49:23,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:49:23,714 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:49:23,715 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:49:23,715 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:49:23,715 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:49:23,716 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:49:23,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:49:23,716 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:49:23,717 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:49:23,717 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:49:23,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:49:23,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:49:23,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:49:23,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:49:23,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:49:23,719 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d [2025-03-03 13:49:23,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:49:23,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:49:23,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:49:23,952 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:49:23,952 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:49:23,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2025-03-03 13:49:25,090 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a9705cf/2e597c0787c74e538eb0525f5687deb4/FLAG2baf4f0b4 [2025-03-03 13:49:25,308 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:49:25,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2025-03-03 13:49:25,316 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a9705cf/2e597c0787c74e538eb0525f5687deb4/FLAG2baf4f0b4 [2025-03-03 13:49:25,647 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a9705cf/2e597c0787c74e538eb0525f5687deb4 [2025-03-03 13:49:25,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:49:25,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:49:25,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:49:25,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:49:25,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:49:25,654 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,654 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dd4e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25, skipping insertion in model container [2025-03-03 13:49:25,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:49:25,769 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2025-03-03 13:49:25,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:49:25,794 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:49:25,804 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2025-03-03 13:49:25,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:49:25,821 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:49:25,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25 WrapperNode [2025-03-03 13:49:25,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:49:25,824 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:49:25,824 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:49:25,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:49:25,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,848 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2025-03-03 13:49:25,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:49:25,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:49:25,850 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:49:25,850 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:49:25,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,870 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]. [2025-03-03 13:49:25,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,872 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,875 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,876 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:49:25,879 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:49:25,879 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:49:25,880 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:49:25,880 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (1/1) ... [2025-03-03 13:49:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:49:25,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:25,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:49:25,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:49:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:49:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:49:25,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:49:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:49:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:49:25,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:49:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:49:25,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:49:25,965 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:49:25,967 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:49:26,090 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:49:26,091 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:49:26,101 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:49:26,102 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:49:26,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:49:26 BoogieIcfgContainer [2025-03-03 13:49:26,102 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:49:26,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:49:26,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:49:26,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:49:26,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:49:25" (1/3) ... [2025-03-03 13:49:26,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274246f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:49:26, skipping insertion in model container [2025-03-03 13:49:26,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:49:25" (2/3) ... [2025-03-03 13:49:26,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274246f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:49:26, skipping insertion in model container [2025-03-03 13:49:26,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:49:26" (3/3) ... [2025-03-03 13:49:26,110 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2025-03-03 13:49:26,122 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:49:26,123 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound10.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:49:26,165 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:49:26,175 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;@32479062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:49:26,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:49:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:49:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:49:26,184 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:26,185 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:26,185 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:26,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash -162508135, now seen corresponding path program 1 times [2025-03-03 13:49:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543916006] [2025-03-03 13:49:26,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:26,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:49:26,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:49:26,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:26,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:49:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543916006] [2025-03-03 13:49:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543916006] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495034849] [2025-03-03 13:49:26,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:26,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:26,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:49:26,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:49:26,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:49:26,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:26,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:26,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:49:26,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:49:26,357 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:49:26,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495034849] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:49:26,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:49:26,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:49:26,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824521502] [2025-03-03 13:49:26,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:49:26,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:49:26,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:26,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:49:26,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:49:26,377 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:49:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:26,390 INFO L93 Difference]: Finished difference Result 51 states and 76 transitions. [2025-03-03 13:49:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:49:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-03 13:49:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:26,396 INFO L225 Difference]: With dead ends: 51 [2025-03-03 13:49:26,396 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 13:49:26,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:49:26,400 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:26,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:49:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 13:49:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-03 13:49:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 13:49:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2025-03-03 13:49:26,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 29 [2025-03-03 13:49:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:26,422 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2025-03-03 13:49:26,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:49:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2025-03-03 13:49:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:49:26,423 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:26,423 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:26,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:49:26,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:49:26,624 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:26,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1105005704, now seen corresponding path program 1 times [2025-03-03 13:49:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550123961] [2025-03-03 13:49:26,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:26,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:49:26,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:49:26,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:26,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:49:26,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288694318] [2025-03-03 13:49:26,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:26,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:26,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:26,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:26,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:49:26,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:49:26,731 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:49:26,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:26,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:26,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:49:26,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:49:26,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:49:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:49:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550123961] [2025-03-03 13:49:27,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:49:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288694318] [2025-03-03 13:49:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288694318] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:49:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2025-03-03 13:49:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119953502] [2025-03-03 13:49:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:49:27,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:49:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:27,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:49:27,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:49:27,148 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:49:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:27,358 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 13:49:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:49:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-03 13:49:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:27,360 INFO L225 Difference]: With dead ends: 33 [2025-03-03 13:49:27,360 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 13:49:27,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:49:27,361 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:27,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:49:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 13:49:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-03 13:49:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2025-03-03 13:49:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-03-03 13:49:27,371 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 29 [2025-03-03 13:49:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:27,372 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-03-03 13:49:27,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:49:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-03-03 13:49:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:49:27,374 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:27,374 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:27,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:49:27,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-03-03 13:49:27,578 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:27,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash 138852969, now seen corresponding path program 1 times [2025-03-03 13:49:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:27,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395858067] [2025-03-03 13:49:27,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:27,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:49:27,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:49:27,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:27,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:49:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097670030] [2025-03-03 13:49:27,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:27,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:27,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:27,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:49:27,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:49:27,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:49:27,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:27,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:27,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:49:27,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:49:27,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:49:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:49:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395858067] [2025-03-03 13:49:27,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:49:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097670030] [2025-03-03 13:49:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097670030] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:49:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-03-03 13:49:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249848776] [2025-03-03 13:49:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:49:27,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:49:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:27,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:49:27,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:49:27,848 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:49:31,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-03-03 13:49:35,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-03-03 13:49:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:35,935 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2025-03-03 13:49:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:49:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2025-03-03 13:49:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:35,936 INFO L225 Difference]: With dead ends: 39 [2025-03-03 13:49:35,936 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:49:35,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:49:35,937 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:35,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-03-03 13:49:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:49:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2025-03-03 13:49:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 13:49:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-03 13:49:35,949 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2025-03-03 13:49:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:35,950 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-03 13:49:35,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:49:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-03 13:49:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:49:35,953 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:35,954 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:35,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:49:36,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:36,158 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:36,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash 960799810, now seen corresponding path program 1 times [2025-03-03 13:49:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566265869] [2025-03-03 13:49:36,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:36,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 13:49:36,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:49:36,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:36,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:49:36,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:36,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566265869] [2025-03-03 13:49:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566265869] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:49:36,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:49:36,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:49:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389706590] [2025-03-03 13:49:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:49:36,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:49:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:36,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:49:36,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:49:36,531 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 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) [2025-03-03 13:49:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:36,562 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2025-03-03 13:49:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 13:49:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 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 36 [2025-03-03 13:49:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:36,564 INFO L225 Difference]: With dead ends: 45 [2025-03-03 13:49:36,564 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 13:49:36,565 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:49:36,565 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:36,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:49:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 13:49:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-03-03 13:49:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:49:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-03-03 13:49:36,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2025-03-03 13:49:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:36,570 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-03-03 13:49:36,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 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) [2025-03-03 13:49:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-03-03 13:49:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:49:36,571 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:36,571 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:36,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-03 13:49:36,571 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:36,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:36,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1279514807, now seen corresponding path program 1 times [2025-03-03 13:49:36,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:36,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60432252] [2025-03-03 13:49:36,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:36,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:36,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 13:49:36,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:49:36,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:36,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:49:36,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60432252] [2025-03-03 13:49:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60432252] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766257705] [2025-03-03 13:49:36,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:36,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:36,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:36,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:49:36,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 13:49:36,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:49:36,733 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:36,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:36,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:49:36,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:49:36,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:49:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:49:36,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766257705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:49:36,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:49:36,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-03-03 13:49:36,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019262612] [2025-03-03 13:49:36,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:49:36,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:49:36,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:36,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:49:36,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:49:36,896 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:49:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:37,251 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2025-03-03 13:49:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:49:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2025-03-03 13:49:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:37,252 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:49:37,252 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 13:49:37,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:49:37,253 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:37,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 197 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:49:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 13:49:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2025-03-03 13:49:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:49:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2025-03-03 13:49:37,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 36 [2025-03-03 13:49:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:37,266 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2025-03-03 13:49:37,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:49:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2025-03-03 13:49:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:49:37,267 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:37,267 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:37,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 13:49:37,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:37,467 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:37,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash -982426575, now seen corresponding path program 1 times [2025-03-03 13:49:37,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:37,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618477760] [2025-03-03 13:49:37,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:37,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:37,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:49:37,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:49:37,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:37,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:49:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584827779] [2025-03-03 13:49:37,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:49:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:37,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:37,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:49:37,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:49:37,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:49:37,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:49:37,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:37,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 13:49:37,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:49:37,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:49:37,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:37,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618477760] [2025-03-03 13:49:37,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:49:37,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584827779] [2025-03-03 13:49:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584827779] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:37,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:49:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-03-03 13:49:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882504520] [2025-03-03 13:49:37,907 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:49:37,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:49:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:37,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:49:37,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:49:37,908 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 13:49:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:38,022 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2025-03-03 13:49:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 13:49:38,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2025-03-03 13:49:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:38,024 INFO L225 Difference]: With dead ends: 40 [2025-03-03 13:49:38,024 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 13:49:38,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:49:38,024 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:38,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 102 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:49:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 13:49:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 13:49:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:49:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-03 13:49:38,032 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 37 [2025-03-03 13:49:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:38,033 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-03 13:49:38,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 13:49:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-03 13:49:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:49:38,035 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:38,035 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:38,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:49:38,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:38,236 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:38,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1976915607, now seen corresponding path program 2 times [2025-03-03 13:49:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7531157] [2025-03-03 13:49:38,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:49:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:38,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:49:38,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:49:38,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:49:38,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-03 13:49:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:49:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7531157] [2025-03-03 13:49:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7531157] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:49:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550806319] [2025-03-03 13:49:38,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:49:38,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:38,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:38,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:49:38,801 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:49:38,837 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:49:38,837 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:49:38,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:38,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:49:38,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:49:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-03 13:49:39,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:49:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-03 13:49:39,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550806319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:49:39,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:49:39,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-03 13:49:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159450064] [2025-03-03 13:49:39,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:49:39,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 13:49:39,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:49:39,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 13:49:39,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:49:39,842 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-03 13:49:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:49:41,383 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2025-03-03 13:49:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:49:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 44 [2025-03-03 13:49:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:49:41,385 INFO L225 Difference]: With dead ends: 63 [2025-03-03 13:49:41,385 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:49:41,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:49:41,386 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:49:41,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 245 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 13:49:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:49:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2025-03-03 13:49:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:49:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2025-03-03 13:49:41,395 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 44 [2025-03-03 13:49:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:49:41,395 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2025-03-03 13:49:41,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-03 13:49:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2025-03-03 13:49:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:49:41,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:49:41,396 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:49:41,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:49:41,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:41,597 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:49:41,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:49:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2121006504, now seen corresponding path program 3 times [2025-03-03 13:49:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:49:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725158929] [2025-03-03 13:49:41,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:49:41,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:49:41,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 4 equivalence classes. [2025-03-03 13:49:41,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:49:41,662 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:49:41,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:49:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685565539] [2025-03-03 13:49:41,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:49:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:49:41,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:49:41,666 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:49:41,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:49:41,691 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 4 equivalence classes. [2025-03-03 13:49:41,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 45 statements. [2025-03-03 13:49:41,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:49:41,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:49:41,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 13:49:41,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:50:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 13:50:49,685 INFO L312 TraceCheckSpWp]: Computing backward predicates...