./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/array-industry-pattern/array_shadowinit.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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:30:23,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:30:23,712 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:30:23,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:30:23,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:30:23,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:30:23,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:30:23,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:30:23,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:30:23,733 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:30:23,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:30:23,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:30:23,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:30:23,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:30:23,734 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:30:23,735 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:30:23,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:30:23,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:30:23,735 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 -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2025-03-16 13:30:23,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:30:23,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:30:23,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:30:23,980 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:30:23,980 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:30:23,981 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2025-03-16 13:30:25,068 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416a24ca3/28a9dc1bb04647f2804a353b1ff8540e/FLAGa34bc5bd0 [2025-03-16 13:30:25,294 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:30:25,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2025-03-16 13:30:25,300 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416a24ca3/28a9dc1bb04647f2804a353b1ff8540e/FLAGa34bc5bd0 [2025-03-16 13:30:25,644 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416a24ca3/28a9dc1bb04647f2804a353b1ff8540e [2025-03-16 13:30:25,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:30:25,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:30:25,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:30:25,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:30:25,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:30:25,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8b0257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25, skipping insertion in model container [2025-03-16 13:30:25,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,661 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:30:25,766 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/array-industry-pattern/array_shadowinit.i[809,822] [2025-03-16 13:30:25,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:30:25,787 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:30:25,794 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/array-industry-pattern/array_shadowinit.i[809,822] [2025-03-16 13:30:25,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:30:25,810 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:30:25,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25 WrapperNode [2025-03-16 13:30:25,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:30:25,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:30:25,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:30:25,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:30:25,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,831 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2025-03-16 13:30:25,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:30:25,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:30:25,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:30:25,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:30:25,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,842 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,852 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:30:25,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,858 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:30:25,865 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:30:25,865 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:30:25,865 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:30:25,866 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (1/1) ... [2025-03-16 13:30:25,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:30:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:25,891 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) [2025-03-16 13:30:25,893 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 [2025-03-16 13:30:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:30:25,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:30:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:30:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:30:25,966 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:30:25,967 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:30:26,052 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-16 13:30:26,052 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:30:26,058 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:30:26,058 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:30:26,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:30:26 BoogieIcfgContainer [2025-03-16 13:30:26,059 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:30:26,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:30:26,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:30:26,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:30:26,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:30:25" (1/3) ... [2025-03-16 13:30:26,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0a5186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:30:26, skipping insertion in model container [2025-03-16 13:30:26,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:30:25" (2/3) ... [2025-03-16 13:30:26,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0a5186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:30:26, skipping insertion in model container [2025-03-16 13:30:26,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:30:26" (3/3) ... [2025-03-16 13:30:26,066 INFO L128 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2025-03-16 13:30:26,076 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:30:26,077 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_shadowinit.i that has 1 procedures, 11 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 13:30:26,109 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:30:26,116 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;@167c84ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:30:26,116 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:30:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 13:30:26,122 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:26,123 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 13:30:26,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:26,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1240533917, now seen corresponding path program 1 times [2025-03-16 13:30:26,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:26,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861594169] [2025-03-16 13:30:26,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:30:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:26,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 13:30:26,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 13:30:26,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:26,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:26,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:26,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861594169] [2025-03-16 13:30:26,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861594169] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:30:26,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:30:26,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:30:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761275696] [2025-03-16 13:30:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:30:26,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:30:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:26,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:30:26,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:30:26,299 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:26,324 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2025-03-16 13:30:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:30:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-16 13:30:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:26,330 INFO L225 Difference]: With dead ends: 20 [2025-03-16 13:30:26,330 INFO L226 Difference]: Without dead ends: 9 [2025-03-16 13:30:26,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:30:26,333 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:26,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-03-16 13:30:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-03-16 13:30:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2025-03-16 13:30:26,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2025-03-16 13:30:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:26,351 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2025-03-16 13:30:26,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2025-03-16 13:30:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 13:30:26,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:26,352 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:30:26,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:30:26,352 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:26,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -197198968, now seen corresponding path program 1 times [2025-03-16 13:30:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550503685] [2025-03-16 13:30:26,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:30:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:26,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:30:26,384 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:30:26,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:26,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550503685] [2025-03-16 13:30:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550503685] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774922265] [2025-03-16 13:30:26,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:30:26,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:26,692 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) [2025-03-16 13:30:26,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:30:26,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:30:26,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:30:26,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:26,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:26,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:30:26,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:26,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:30:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:26,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:26,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-16 13:30:26,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-16 13:30:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:26,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774922265] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:26,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:26,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:30:26,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190593106] [2025-03-16 13:30:26,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:26,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:30:26,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:26,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:30:26,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:30:26,902 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:26,946 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2025-03-16 13:30:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:30:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 13:30:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:26,946 INFO L225 Difference]: With dead ends: 14 [2025-03-16 13:30:26,946 INFO L226 Difference]: Without dead ends: 12 [2025-03-16 13:30:26,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:30:26,947 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:26,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-03-16 13:30:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2025-03-16 13:30:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2025-03-16 13:30:26,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2025-03-16 13:30:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:26,950 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2025-03-16 13:30:26,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2025-03-16 13:30:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 13:30:26,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:26,951 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:30:26,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:30:27,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:27,155 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:27,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 761676065, now seen corresponding path program 1 times [2025-03-16 13:30:27,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:27,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726380738] [2025-03-16 13:30:27,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:30:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:27,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 13:30:27,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 13:30:27,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:27,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:27,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726380738] [2025-03-16 13:30:27,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726380738] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:27,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441153423] [2025-03-16 13:30:27,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:30:27,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:27,245 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) [2025-03-16 13:30:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:30:27,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 13:30:27,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 13:30:27,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:27,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:27,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:30:27,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:27,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441153423] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:27,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:30:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167220714] [2025-03-16 13:30:27,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:27,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:30:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:27,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:30:27,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:30:27,351 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:27,392 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2025-03-16 13:30:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:30:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-16 13:30:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:27,393 INFO L225 Difference]: With dead ends: 27 [2025-03-16 13:30:27,393 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 13:30:27,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:30:27,395 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:27,395 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 23 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 13:30:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2025-03-16 13:30:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2025-03-16 13:30:27,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2025-03-16 13:30:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:27,400 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2025-03-16 13:30:27,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2025-03-16 13:30:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:30:27,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:27,400 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:30:27,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:30:27,601 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,SelfDestructingSolverStorable2 [2025-03-16 13:30:27,601 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:27,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 504644492, now seen corresponding path program 2 times [2025-03-16 13:30:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618390889] [2025-03-16 13:30:27,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:27,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-16 13:30:27,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:30:27,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:27,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:27,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618390889] [2025-03-16 13:30:27,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618390889] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:27,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771324085] [2025-03-16 13:30:27,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:27,841 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) [2025-03-16 13:30:27,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:30:27,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-16 13:30:27,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:30:27,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:27,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:27,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 13:30:27,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:27,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:30:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:27,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:28,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:28,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:28,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771324085] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:28,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:28,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-16 13:30:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299856433] [2025-03-16 13:30:28,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:28,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:30:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:28,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:30:28,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:30:28,084 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:28,232 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2025-03-16 13:30:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:30:28,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 13:30:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:28,234 INFO L225 Difference]: With dead ends: 27 [2025-03-16 13:30:28,234 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 13:30:28,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:30:28,235 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:28,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 36 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 13:30:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2025-03-16 13:30:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-03-16 13:30:28,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2025-03-16 13:30:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:28,238 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-03-16 13:30:28,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-03-16 13:30:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 13:30:28,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:28,239 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:30:28,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:30:28,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:28,439 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:28,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1479395997, now seen corresponding path program 3 times [2025-03-16 13:30:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910433993] [2025-03-16 13:30:28,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:28,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 3 equivalence classes. [2025-03-16 13:30:28,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:30:28,465 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:30:28,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:28,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:28,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910433993] [2025-03-16 13:30:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910433993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:28,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364416311] [2025-03-16 13:30:28,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:28,547 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) [2025-03-16 13:30:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:30:28,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 3 equivalence classes. [2025-03-16 13:30:28,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:30:28,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:30:28,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:28,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:30:28,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:28,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364416311] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:28,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:28,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-03-16 13:30:28,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123560132] [2025-03-16 13:30:28,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:28,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 13:30:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:28,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 13:30:28,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-16 13:30:28,699 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:28,758 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2025-03-16 13:30:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:30:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 13:30:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:28,758 INFO L225 Difference]: With dead ends: 34 [2025-03-16 13:30:28,758 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 13:30:28,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:30:28,759 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:28,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 13:30:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2025-03-16 13:30:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2025-03-16 13:30:28,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2025-03-16 13:30:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:28,764 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2025-03-16 13:30:28,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2025-03-16 13:30:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 13:30:28,765 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:28,765 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:30:28,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:30:28,965 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 [2025-03-16 13:30:28,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:28,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1676582792, now seen corresponding path program 4 times [2025-03-16 13:30:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319898547] [2025-03-16 13:30:28,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:28,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:28,971 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-16 13:30:28,995 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 13:30:28,995 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:28,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319898547] [2025-03-16 13:30:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319898547] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237347792] [2025-03-16 13:30:29,160 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:29,163 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) [2025-03-16 13:30:29,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:30:29,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-16 13:30:29,204 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 13:30:29,205 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:29,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:29,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 13:30:29,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:29,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:29,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:29,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237347792] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:29,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:29,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2025-03-16 13:30:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52202561] [2025-03-16 13:30:29,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:29,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:30:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:29,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:30:29,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:30:29,379 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:29,453 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2025-03-16 13:30:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:30:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 13:30:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:29,454 INFO L225 Difference]: With dead ends: 22 [2025-03-16 13:30:29,454 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 13:30:29,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:30:29,455 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:29,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 13:30:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2025-03-16 13:30:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2025-03-16 13:30:29,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2025-03-16 13:30:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:29,462 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2025-03-16 13:30:29,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2025-03-16 13:30:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:30:29,462 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:29,462 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:30:29,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:29,663 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 [2025-03-16 13:30:29,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:29,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 904142113, now seen corresponding path program 5 times [2025-03-16 13:30:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675318723] [2025-03-16 13:30:29,664 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:29,669 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 4 equivalence classes. [2025-03-16 13:30:29,676 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:30:29,676 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:30:29,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675318723] [2025-03-16 13:30:29,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675318723] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525641708] [2025-03-16 13:30:29,744 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:29,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:29,746 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) [2025-03-16 13:30:29,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:30:29,779 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 4 equivalence classes. [2025-03-16 13:30:29,793 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:30:29,793 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:30:29,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:29,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:30:29,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525641708] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:29,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:29,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2025-03-16 13:30:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508108570] [2025-03-16 13:30:29,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:29,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:30:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:29,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:30:29,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:30:29,910 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:29,968 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2025-03-16 13:30:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:30:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 13:30:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:29,969 INFO L225 Difference]: With dead ends: 41 [2025-03-16 13:30:29,969 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:30:29,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:30:29,970 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:29,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:30:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2025-03-16 13:30:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-03-16 13:30:29,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2025-03-16 13:30:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:29,976 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-03-16 13:30:29,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-03-16 13:30:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:30:29,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:29,977 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:30:29,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:30,177 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 [2025-03-16 13:30:30,178 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:30,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 436896908, now seen corresponding path program 6 times [2025-03-16 13:30:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:30,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645237060] [2025-03-16 13:30:30,180 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:30,193 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 4 equivalence classes. [2025-03-16 13:30:30,209 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:30:30,209 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:30:30,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645237060] [2025-03-16 13:30:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645237060] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239839457] [2025-03-16 13:30:30,507 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:30,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:30,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:30,509 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) [2025-03-16 13:30:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:30:30,539 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 4 equivalence classes. [2025-03-16 13:30:30,569 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:30:30,570 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:30:30,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:30,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:30:30,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:30,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:30,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:30,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:30,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:30,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239839457] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:30,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:30,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2025-03-16 13:30:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111358866] [2025-03-16 13:30:30,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:30,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 13:30:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:30,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 13:30:30,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:30:30,850 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:31,269 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2025-03-16 13:30:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:30:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 13:30:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:31,270 INFO L225 Difference]: With dead ends: 50 [2025-03-16 13:30:31,270 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 13:30:31,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 13:30:31,271 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:31,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 13:30:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-03-16 13:30:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2025-03-16 13:30:31,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2025-03-16 13:30:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:31,274 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2025-03-16 13:30:31,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2025-03-16 13:30:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:30:31,274 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:31,274 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 13:30:31,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:31,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:31,479 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:31,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:31,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2138922104, now seen corresponding path program 7 times [2025-03-16 13:30:31,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:31,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843530134] [2025-03-16 13:30:31,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:31,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:30:31,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:30:31,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:31,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:31,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:31,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843530134] [2025-03-16 13:30:31,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843530134] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:31,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142041050] [2025-03-16 13:30:31,837 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:31,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:31,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:31,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:30:31,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:30:31,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:30:31,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:31,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:31,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-16 13:30:31,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:31,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:30:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:32,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:32,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:32,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:32,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142041050] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:32,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2025-03-16 13:30:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188952018] [2025-03-16 13:30:32,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:32,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-16 13:30:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:32,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-16 13:30:32,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:30:32,261 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:32,480 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2025-03-16 13:30:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:30:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:30:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:32,482 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:30:32,482 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 13:30:32,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:30:32,483 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:32,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 138 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:30:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 13:30:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2025-03-16 13:30:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2025-03-16 13:30:32,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2025-03-16 13:30:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:32,489 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2025-03-16 13:30:32,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2025-03-16 13:30:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:30:32,490 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:32,490 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 13:30:32,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:30:32,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 13:30:32,690 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:32,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -492725983, now seen corresponding path program 8 times [2025-03-16 13:30:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394789083] [2025-03-16 13:30:32,692 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:32,700 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:30:32,705 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:30:32,705 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:32,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:32,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:32,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394789083] [2025-03-16 13:30:32,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394789083] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:32,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301245155] [2025-03-16 13:30:32,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:32,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:32,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:32,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:30:32,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:30:32,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:30:32,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:32,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:32,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:30:32,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:32,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301245155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:33,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:33,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-16 13:30:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857949060] [2025-03-16 13:30:33,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:33,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:30:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:33,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:30:33,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:30:33,070 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:33,153 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2025-03-16 13:30:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:30:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 13:30:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:33,154 INFO L225 Difference]: With dead ends: 55 [2025-03-16 13:30:33,154 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:30:33,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:30:33,155 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:33,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:30:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:30:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2025-03-16 13:30:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2025-03-16 13:30:33,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2025-03-16 13:30:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:33,162 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2025-03-16 13:30:33,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2025-03-16 13:30:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:30:33,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:33,162 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 13:30:33,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:33,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:30:33,363 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:33,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1039440500, now seen corresponding path program 9 times [2025-03-16 13:30:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:33,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477573967] [2025-03-16 13:30:33,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:33,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:33,372 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 6 equivalence classes. [2025-03-16 13:30:33,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:30:33,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:30:33,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:33,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:33,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477573967] [2025-03-16 13:30:33,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477573967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:33,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125045757] [2025-03-16 13:30:33,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:33,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:33,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:33,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:33,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:30:33,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 6 equivalence classes. [2025-03-16 13:30:33,839 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:30:33,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:30:33,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:33,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 13:30:33,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:33,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:34,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:34,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:34,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125045757] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:34,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:34,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2025-03-16 13:30:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542075003] [2025-03-16 13:30:34,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:34,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 13:30:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:34,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 13:30:34,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 13:30:34,299 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:34,992 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2025-03-16 13:30:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:30:34,992 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-16 13:30:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:34,993 INFO L225 Difference]: With dead ends: 64 [2025-03-16 13:30:34,993 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 13:30:34,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=3064, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 13:30:34,994 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:34,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 150 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:30:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 13:30:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2025-03-16 13:30:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2025-03-16 13:30:34,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2025-03-16 13:30:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:34,998 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2025-03-16 13:30:34,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2025-03-16 13:30:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:30:34,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:34,999 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2025-03-16 13:30:35,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:30:35,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 13:30:35,199 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:35,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1876101000, now seen corresponding path program 10 times [2025-03-16 13:30:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825440160] [2025-03-16 13:30:35,200 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:35,207 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:30:35,218 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:30:35,218 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:35,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:35,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825440160] [2025-03-16 13:30:35,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825440160] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853904805] [2025-03-16 13:30:35,503 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:35,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:35,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:30:35,546 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:30:35,585 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:30:35,585 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:35,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:35,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-16 13:30:35,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:35,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:35,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:35,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:35,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853904805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:35,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 28 [2025-03-16 13:30:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953021460] [2025-03-16 13:30:35,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:35,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 13:30:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:35,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 13:30:35,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2025-03-16 13:30:35,856 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:36,049 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2025-03-16 13:30:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:30:36,050 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 13:30:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:36,050 INFO L225 Difference]: With dead ends: 38 [2025-03-16 13:30:36,050 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:30:36,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2025-03-16 13:30:36,051 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:36,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:30:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:30:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2025-03-16 13:30:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2025-03-16 13:30:36,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2025-03-16 13:30:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:36,055 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2025-03-16 13:30:36,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2025-03-16 13:30:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:30:36,055 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:36,055 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 13:30:36,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 13:30:36,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:30:36,256 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:36,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash 516338977, now seen corresponding path program 11 times [2025-03-16 13:30:36,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:36,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956289567] [2025-03-16 13:30:36,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:36,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:36,263 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 8 equivalence classes. [2025-03-16 13:30:36,271 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:30:36,271 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 13:30:36,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:36,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956289567] [2025-03-16 13:30:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956289567] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544431213] [2025-03-16 13:30:36,417 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:36,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:36,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:36,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:36,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:30:36,458 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 34 statements into 8 equivalence classes. [2025-03-16 13:30:36,487 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:30:36,487 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 13:30:36,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:36,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 13:30:36,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:36,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544431213] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:36,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:36,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2025-03-16 13:30:36,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291609064] [2025-03-16 13:30:36,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:36,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 13:30:36,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:36,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 13:30:36,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:30:36,773 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:36,878 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2025-03-16 13:30:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:30:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-16 13:30:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:36,879 INFO L225 Difference]: With dead ends: 69 [2025-03-16 13:30:36,879 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 13:30:36,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 13:30:36,879 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:36,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 13:30:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2025-03-16 13:30:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2025-03-16 13:30:36,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2025-03-16 13:30:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:36,887 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2025-03-16 13:30:36,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2025-03-16 13:30:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 13:30:36,888 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:36,888 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 13:30:36,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:37,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:30:37,091 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:37,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 104785548, now seen corresponding path program 12 times [2025-03-16 13:30:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:37,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742569383] [2025-03-16 13:30:37,091 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:37,096 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 8 equivalence classes. [2025-03-16 13:30:37,106 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 13:30:37,106 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-16 13:30:37,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:37,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742569383] [2025-03-16 13:30:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742569383] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161740173] [2025-03-16 13:30:37,451 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:37,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:37,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:30:37,512 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 8 equivalence classes. [2025-03-16 13:30:37,613 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 13:30:37,613 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-16 13:30:37,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:37,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 13:30:37,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:37,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:37,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:38,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:38,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:38,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161740173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:38,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:38,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 38 [2025-03-16 13:30:38,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540736622] [2025-03-16 13:30:38,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:38,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 13:30:38,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:38,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 13:30:38,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 13:30:38,074 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:38,358 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2025-03-16 13:30:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:30:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 13:30:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:38,360 INFO L225 Difference]: With dead ends: 42 [2025-03-16 13:30:38,360 INFO L226 Difference]: Without dead ends: 40 [2025-03-16 13:30:38,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:30:38,361 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:38,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 211 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:30:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-16 13:30:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-03-16 13:30:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2025-03-16 13:30:38,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2025-03-16 13:30:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:38,365 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2025-03-16 13:30:38,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2025-03-16 13:30:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:30:38,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:38,366 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1] [2025-03-16 13:30:38,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:38,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:30:38,568 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:38,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -774092899, now seen corresponding path program 13 times [2025-03-16 13:30:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291137562] [2025-03-16 13:30:38,568 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:38,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:30:38,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:30:38,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:38,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291137562] [2025-03-16 13:30:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291137562] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615186062] [2025-03-16 13:30:38,759 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:38,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:38,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:38,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:30:38,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:30:38,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:30:38,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:38,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:38,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 13:30:38,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:39,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:39,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615186062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:39,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:39,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2025-03-16 13:30:39,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258164851] [2025-03-16 13:30:39,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:39,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 13:30:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:39,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 13:30:39,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:30:39,166 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:39,292 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2025-03-16 13:30:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 13:30:39,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:30:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:39,293 INFO L225 Difference]: With dead ends: 76 [2025-03-16 13:30:39,293 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 13:30:39,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:30:39,294 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:39,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 88 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 13:30:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2025-03-16 13:30:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2025-03-16 13:30:39,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2025-03-16 13:30:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:39,298 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2025-03-16 13:30:39,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2025-03-16 13:30:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 13:30:39,299 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:39,299 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1] [2025-03-16 13:30:39,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 13:30:39,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:39,499 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:39,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -172504184, now seen corresponding path program 14 times [2025-03-16 13:30:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:39,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455208835] [2025-03-16 13:30:39,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:39,512 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-16 13:30:39,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:30:39,524 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:39,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455208835] [2025-03-16 13:30:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455208835] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720030691] [2025-03-16 13:30:39,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:39,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:39,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:30:40,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-16 13:30:40,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:30:40,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:40,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:40,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 13:30:40,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:40,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:30:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:40,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:40,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:40,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720030691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:41,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:41,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 61 [2025-03-16 13:30:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936837105] [2025-03-16 13:30:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:41,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-16 13:30:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:41,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-16 13:30:41,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3424, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 13:30:41,006 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 61 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 61 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:42,044 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2025-03-16 13:30:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-16 13:30:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 61 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-16 13:30:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:42,045 INFO L225 Difference]: With dead ends: 85 [2025-03-16 13:30:42,045 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 13:30:42,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=588, Invalid=7068, Unknown=0, NotChecked=0, Total=7656 [2025-03-16 13:30:42,047 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:42,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 331 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:30:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 13:30:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2025-03-16 13:30:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2025-03-16 13:30:42,052 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2025-03-16 13:30:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:42,052 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2025-03-16 13:30:42,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 61 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2025-03-16 13:30:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 13:30:42,053 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:42,053 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1] [2025-03-16 13:30:42,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:42,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 13:30:42,257 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:42,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2026702732, now seen corresponding path program 15 times [2025-03-16 13:30:42,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:42,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380130909] [2025-03-16 13:30:42,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:42,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:42,268 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 10 equivalence classes. [2025-03-16 13:30:42,291 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:30:42,291 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-16 13:30:42,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380130909] [2025-03-16 13:30:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380130909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874315905] [2025-03-16 13:30:42,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:42,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:42,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:42,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:30:42,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 10 equivalence classes. [2025-03-16 13:30:43,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:30:43,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-16 13:30:43,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:43,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 13:30:43,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:43,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:43,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:43,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:43,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874315905] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:43,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2025-03-16 13:30:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173247548] [2025-03-16 13:30:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:43,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-16 13:30:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:43,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-16 13:30:43,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:30:43,979 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:44,957 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2025-03-16 13:30:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 13:30:44,957 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-16 13:30:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:44,957 INFO L225 Difference]: With dead ends: 92 [2025-03-16 13:30:44,957 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:30:44,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2025-03-16 13:30:44,959 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:44,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 332 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:30:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:30:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2025-03-16 13:30:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2025-03-16 13:30:44,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2025-03-16 13:30:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:44,965 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2025-03-16 13:30:44,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2025-03-16 13:30:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:30:44,966 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:44,966 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1] [2025-03-16 13:30:44,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:30:45,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:30:45,167 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:45,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash -200740984, now seen corresponding path program 16 times [2025-03-16 13:30:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:45,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263913810] [2025-03-16 13:30:45,168 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:45,175 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:30:45,201 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:30:45,202 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:45,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263913810] [2025-03-16 13:30:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263913810] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090332178] [2025-03-16 13:30:45,730 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:45,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:45,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:45,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:45,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:30:45,788 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:30:45,878 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:30:45,878 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:45,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:45,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 13:30:45,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:45,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:46,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:46,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:46,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:46,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090332178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:46,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:46,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2025-03-16 13:30:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785262924] [2025-03-16 13:30:46,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:46,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 13:30:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:46,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 13:30:46,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 13:30:46,310 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:46,763 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2025-03-16 13:30:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:30:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:30:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:46,764 INFO L225 Difference]: With dead ends: 54 [2025-03-16 13:30:46,764 INFO L226 Difference]: Without dead ends: 52 [2025-03-16 13:30:46,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1379, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:30:46,765 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:46,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 372 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:30:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-16 13:30:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2025-03-16 13:30:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2025-03-16 13:30:46,770 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2025-03-16 13:30:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:46,770 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2025-03-16 13:30:46,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2025-03-16 13:30:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:30:46,771 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:46,771 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1] [2025-03-16 13:30:46,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 13:30:46,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:30:46,972 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:46,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1679307487, now seen corresponding path program 17 times [2025-03-16 13:30:46,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:46,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897655692] [2025-03-16 13:30:46,972 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:46,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:46,981 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 12 equivalence classes. [2025-03-16 13:30:46,992 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:30:46,992 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-16 13:30:46,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:47,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897655692] [2025-03-16 13:30:47,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897655692] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182286545] [2025-03-16 13:30:47,268 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:47,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:47,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:30:47,326 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 12 equivalence classes. [2025-03-16 13:30:47,405 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:30:47,406 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-16 13:30:47,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:47,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:30:47,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:47,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182286545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:47,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:47,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2025-03-16 13:30:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963703540] [2025-03-16 13:30:47,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:47,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 13:30:47,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:47,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 13:30:47,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 13:30:47,867 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:48,011 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2025-03-16 13:30:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:30:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-03-16 13:30:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:48,012 INFO L225 Difference]: With dead ends: 97 [2025-03-16 13:30:48,012 INFO L226 Difference]: Without dead ends: 58 [2025-03-16 13:30:48,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 23 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 13:30:48,013 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:48,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 90 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-16 13:30:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2025-03-16 13:30:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2025-03-16 13:30:48,023 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2025-03-16 13:30:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:48,023 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2025-03-16 13:30:48,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2025-03-16 13:30:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:30:48,024 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:48,024 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1] [2025-03-16 13:30:48,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:48,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:48,225 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:48,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -841103220, now seen corresponding path program 18 times [2025-03-16 13:30:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790661367] [2025-03-16 13:30:48,225 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:48,236 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 51 statements into 12 equivalence classes. [2025-03-16 13:30:48,264 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:30:48,264 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-16 13:30:48,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:48,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790661367] [2025-03-16 13:30:48,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790661367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058422409] [2025-03-16 13:30:48,780 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:30:48,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:48,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:48,781 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:48,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:30:48,842 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 51 statements into 12 equivalence classes. [2025-03-16 13:30:49,211 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:30:49,211 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-16 13:30:49,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:49,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-16 13:30:49,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:49,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:49,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:49,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:49,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:49,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058422409] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:49,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:49,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2025-03-16 13:30:49,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980818073] [2025-03-16 13:30:49,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:49,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 13:30:49,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:49,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 13:30:49,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:30:49,640 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:50,056 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2025-03-16 13:30:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 13:30:50,056 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:30:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:50,057 INFO L225 Difference]: With dead ends: 58 [2025-03-16 13:30:50,057 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 13:30:50,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 13:30:50,058 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:50,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 421 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:30:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 13:30:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2025-03-16 13:30:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2025-03-16 13:30:50,065 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2025-03-16 13:30:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:50,065 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2025-03-16 13:30:50,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2025-03-16 13:30:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 13:30:50,065 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:50,065 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1] [2025-03-16 13:30:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:50,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:50,266 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:50,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash -465951331, now seen corresponding path program 19 times [2025-03-16 13:30:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:50,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552815115] [2025-03-16 13:30:50,266 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:50,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 13:30:50,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:30:50,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:50,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552815115] [2025-03-16 13:30:50,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552815115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998591112] [2025-03-16 13:30:50,588 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:30:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:50,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:50,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 13:30:50,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 13:30:50,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 13:30:50,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:30:50,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:50,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 13:30:50,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:50,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998591112] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:51,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2025-03-16 13:30:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308538641] [2025-03-16 13:30:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:51,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-16 13:30:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:51,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-16 13:30:51,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 13:30:51,157 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:51,300 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2025-03-16 13:30:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 13:30:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-03-16 13:30:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:51,301 INFO L225 Difference]: With dead ends: 104 [2025-03-16 13:30:51,301 INFO L226 Difference]: Without dead ends: 62 [2025-03-16 13:30:51,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 69 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:30:51,302 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:51,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 105 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-16 13:30:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2025-03-16 13:30:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2025-03-16 13:30:51,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2025-03-16 13:30:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:51,308 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2025-03-16 13:30:51,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2025-03-16 13:30:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 13:30:51,309 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:51,309 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1] [2025-03-16 13:30:51,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:51,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-16 13:30:51,509 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:51,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -358714488, now seen corresponding path program 20 times [2025-03-16 13:30:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:51,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577750254] [2025-03-16 13:30:51,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:51,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:51,520 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:30:51,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:30:51,531 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:51,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577750254] [2025-03-16 13:30:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577750254] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361484972] [2025-03-16 13:30:52,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:30:52,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:52,335 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:52,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 13:30:52,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:30:52,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:30:52,423 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:30:52,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:52,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 13:30:52,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:52,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:30:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:53,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:53,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:53,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361484972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:54,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:54,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2025-03-16 13:30:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396642293] [2025-03-16 13:30:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:54,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-16 13:30:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:54,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-16 13:30:54,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=6872, Unknown=0, NotChecked=0, Total=7140 [2025-03-16 13:30:54,236 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:55,292 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2025-03-16 13:30:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-16 13:30:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2025-03-16 13:30:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:55,293 INFO L225 Difference]: With dead ends: 104 [2025-03-16 13:30:55,293 INFO L226 Difference]: Without dead ends: 102 [2025-03-16 13:30:55,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=366, Invalid=8946, Unknown=0, NotChecked=0, Total=9312 [2025-03-16 13:30:55,296 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:55,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 789 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 13:30:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-16 13:30:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2025-03-16 13:30:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2025-03-16 13:30:55,305 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2025-03-16 13:30:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:55,305 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2025-03-16 13:30:55,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2025-03-16 13:30:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 13:30:55,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:55,306 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1] [2025-03-16 13:30:55,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 13:30:55,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 13:30:55,506 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:55,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash -583808735, now seen corresponding path program 21 times [2025-03-16 13:30:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:55,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379118074] [2025-03-16 13:30:55,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:55,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 14 equivalence classes. [2025-03-16 13:30:55,531 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 13:30:55,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-16 13:30:55,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379118074] [2025-03-16 13:30:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379118074] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765298427] [2025-03-16 13:30:55,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:30:55,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:55,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:55,867 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:55,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 13:30:55,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 14 equivalence classes. [2025-03-16 13:30:56,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 13:30:56,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-16 13:30:56,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:56,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 13:30:56,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:56,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:56,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765298427] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:56,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:56,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2025-03-16 13:30:56,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553647060] [2025-03-16 13:30:56,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:56,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:30:56,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:56,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:30:56,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:30:56,745 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:56,907 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2025-03-16 13:30:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 13:30:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-16 13:30:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:56,908 INFO L225 Difference]: With dead ends: 111 [2025-03-16 13:30:56,908 INFO L226 Difference]: Without dead ends: 66 [2025-03-16 13:30:56,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 74 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=2599, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 13:30:56,908 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:56,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 106 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:30:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-16 13:30:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2025-03-16 13:30:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2025-03-16 13:30:56,916 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2025-03-16 13:30:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:56,916 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2025-03-16 13:30:56,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2025-03-16 13:30:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 13:30:56,917 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:56,917 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1] [2025-03-16 13:30:56,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:57,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:57,117 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:57,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1536764300, now seen corresponding path program 22 times [2025-03-16 13:30:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543160187] [2025-03-16 13:30:57,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:57,127 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 59 statements into 2 equivalence classes. [2025-03-16 13:30:57,149 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 13:30:57,149 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:57,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:57,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543160187] [2025-03-16 13:30:57,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543160187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812750302] [2025-03-16 13:30:57,734 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:30:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:57,736 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:57,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 13:30:57,808 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 59 statements into 2 equivalence classes. [2025-03-16 13:30:57,967 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 13:30:57,967 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:30:57,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:57,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 13:30:57,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:30:57,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:30:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:58,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:30:58,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:30:58,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:30:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812750302] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:30:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:30:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 47 [2025-03-16 13:30:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786055362] [2025-03-16 13:30:58,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:30:58,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-16 13:30:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:30:58,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-16 13:30:58,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2042, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 13:30:58,523 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:30:59,028 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2025-03-16 13:30:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:30:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-03-16 13:30:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:30:59,029 INFO L225 Difference]: With dead ends: 66 [2025-03-16 13:30:59,029 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 13:30:59,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:30:59,030 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:30:59,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 546 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:30:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 13:30:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2025-03-16 13:30:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2025-03-16 13:30:59,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2025-03-16 13:30:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:30:59,039 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2025-03-16 13:30:59,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:30:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2025-03-16 13:30:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 13:30:59,040 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:30:59,040 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1] [2025-03-16 13:30:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 13:30:59,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:59,240 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:30:59,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:30:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1689724061, now seen corresponding path program 23 times [2025-03-16 13:30:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:30:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413588694] [2025-03-16 13:30:59,241 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:30:59,248 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 15 equivalence classes. [2025-03-16 13:30:59,265 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 13:30:59,265 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 13:30:59,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:30:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:30:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413588694] [2025-03-16 13:30:59,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413588694] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:30:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905051636] [2025-03-16 13:30:59,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:30:59,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:30:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:30:59,647 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:30:59,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 13:30:59,726 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 15 equivalence classes. [2025-03-16 13:30:59,855 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 13:30:59,855 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 13:30:59,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:30:59,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 13:30:59,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:00,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:00,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905051636] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:00,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:00,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 47 [2025-03-16 13:31:00,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806092170] [2025-03-16 13:31:00,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:00,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-16 13:31:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:00,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-16 13:31:00,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 13:31:00,421 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:00,619 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2025-03-16 13:31:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:31:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2025-03-16 13:31:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:00,620 INFO L225 Difference]: With dead ends: 118 [2025-03-16 13:31:00,620 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 13:31:00,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 80 SyntacticMatches, 29 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 13:31:00,621 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 172 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:00,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 147 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:31:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 13:31:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2025-03-16 13:31:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2025-03-16 13:31:00,629 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2025-03-16 13:31:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:00,629 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2025-03-16 13:31:00,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2025-03-16 13:31:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 13:31:00,630 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:00,630 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1] [2025-03-16 13:31:00,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:00,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-16 13:31:00,830 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:00,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2001753992, now seen corresponding path program 24 times [2025-03-16 13:31:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390543057] [2025-03-16 13:31:00,831 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:00,839 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 63 statements into 15 equivalence classes. [2025-03-16 13:31:00,875 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 13:31:00,875 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-03-16 13:31:00,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 234 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:01,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:01,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390543057] [2025-03-16 13:31:01,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390543057] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:01,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527215045] [2025-03-16 13:31:01,715 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:01,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:01,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:01,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 13:31:01,800 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 63 statements into 15 equivalence classes. [2025-03-16 13:31:02,138 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 13:31:02,138 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-03-16 13:31:02,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:02,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-16 13:31:02,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:02,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:31:02,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-03-16 13:31:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:03,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:04,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2025-03-16 13:31:04,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:31:04,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2025-03-16 13:31:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527215045] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:04,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:04,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 36] total 100 [2025-03-16 13:31:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774070015] [2025-03-16 13:31:04,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:04,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2025-03-16 13:31:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:04,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2025-03-16 13:31:04,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=9424, Unknown=0, NotChecked=0, Total=9900 [2025-03-16 13:31:04,610 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 100 states, 100 states have (on average 1.84) internal successors, (184), 100 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:06,482 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2025-03-16 13:31:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-16 13:31:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.84) internal successors, (184), 100 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2025-03-16 13:31:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:06,482 INFO L225 Difference]: With dead ends: 127 [2025-03-16 13:31:06,482 INFO L226 Difference]: Without dead ends: 74 [2025-03-16 13:31:06,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=994, Invalid=14756, Unknown=0, NotChecked=0, Total=15750 [2025-03-16 13:31:06,483 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:06,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 731 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:31:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-16 13:31:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2025-03-16 13:31:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2025-03-16 13:31:06,492 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2025-03-16 13:31:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:06,492 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2025-03-16 13:31:06,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.84) internal successors, (184), 100 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2025-03-16 13:31:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 13:31:06,493 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:06,493 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1] [2025-03-16 13:31:06,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 13:31:06,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-16 13:31:06,694 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:06,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1708709236, now seen corresponding path program 25 times [2025-03-16 13:31:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670647893] [2025-03-16 13:31:06,694 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:06,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 13:31:06,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:31:06,714 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:06,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670647893] [2025-03-16 13:31:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670647893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010460710] [2025-03-16 13:31:07,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:07,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:07,481 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 13:31:07,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 13:31:07,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 13:31:07,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:07,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:07,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-16 13:31:07,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:08,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:31:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:08,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:08,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:08,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:08,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010460710] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:08,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:08,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2025-03-16 13:31:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94742470] [2025-03-16 13:31:08,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:08,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 13:31:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:08,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 13:31:08,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:31:08,883 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 71 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:09,555 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2025-03-16 13:31:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 13:31:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 71 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-03-16 13:31:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:09,556 INFO L225 Difference]: With dead ends: 74 [2025-03-16 13:31:09,556 INFO L226 Difference]: Without dead ends: 72 [2025-03-16 13:31:09,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=4896, Unknown=0, NotChecked=0, Total=5112 [2025-03-16 13:31:09,557 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:09,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 822 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:31:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-16 13:31:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2025-03-16 13:31:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2025-03-16 13:31:09,566 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2025-03-16 13:31:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:09,566 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2025-03-16 13:31:09,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 71 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2025-03-16 13:31:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-16 13:31:09,566 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:09,566 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1] [2025-03-16 13:31:09,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-16 13:31:09,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-16 13:31:09,767 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:09,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -203586659, now seen corresponding path program 26 times [2025-03-16 13:31:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:09,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641105448] [2025-03-16 13:31:09,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:09,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:09,777 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-16 13:31:09,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 13:31:09,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:09,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:10,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641105448] [2025-03-16 13:31:10,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641105448] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167900447] [2025-03-16 13:31:10,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:10,250 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:10,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 13:31:10,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-16 13:31:10,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 13:31:10,368 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:10,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:10,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 13:31:10,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:10,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:11,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167900447] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:11,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:11,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2025-03-16 13:31:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357105260] [2025-03-16 13:31:11,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:11,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 13:31:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:11,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 13:31:11,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:31:11,106 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:11,310 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2025-03-16 13:31:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 13:31:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2025-03-16 13:31:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:11,311 INFO L225 Difference]: With dead ends: 132 [2025-03-16 13:31:11,311 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 13:31:11,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 89 SyntacticMatches, 32 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1177, Invalid=3793, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:31:11,312 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 142 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:11,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 160 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:31:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 13:31:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2025-03-16 13:31:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2025-03-16 13:31:11,321 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2025-03-16 13:31:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:11,321 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2025-03-16 13:31:11,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2025-03-16 13:31:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 13:31:11,322 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:11,322 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1] [2025-03-16 13:31:11,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-16 13:31:11,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-16 13:31:11,522 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:11,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash -705258616, now seen corresponding path program 27 times [2025-03-16 13:31:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:11,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141611173] [2025-03-16 13:31:11,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:11,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:11,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 17 equivalence classes. [2025-03-16 13:31:11,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 13:31:11,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-16 13:31:11,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 315 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141611173] [2025-03-16 13:31:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141611173] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37917255] [2025-03-16 13:31:12,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:12,594 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:12,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 13:31:12,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 17 equivalence classes. [2025-03-16 13:31:13,992 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 13:31:13,992 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-16 13:31:13,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:13,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-16 13:31:13,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:14,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:31:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:15,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:16,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:16,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37917255] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:16,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:16,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2025-03-16 13:31:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724697884] [2025-03-16 13:31:16,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:16,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2025-03-16 13:31:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:16,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2025-03-16 13:31:16,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=7817, Unknown=0, NotChecked=0, Total=8190 [2025-03-16 13:31:16,089 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:18,196 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2025-03-16 13:31:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-16 13:31:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-03-16 13:31:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:18,197 INFO L225 Difference]: With dead ends: 141 [2025-03-16 13:31:18,197 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 13:31:18,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=837, Invalid=12735, Unknown=0, NotChecked=0, Total=13572 [2025-03-16 13:31:18,198 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:18,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1098 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 13:31:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 13:31:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2025-03-16 13:31:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2025-03-16 13:31:18,211 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2025-03-16 13:31:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:18,211 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2025-03-16 13:31:18,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2025-03-16 13:31:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 13:31:18,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:18,212 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1] [2025-03-16 13:31:18,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-16 13:31:18,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-16 13:31:18,413 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:18,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1548760180, now seen corresponding path program 28 times [2025-03-16 13:31:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:18,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916824439] [2025-03-16 13:31:18,413 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:18,424 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-03-16 13:31:18,447 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 13:31:18,448 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:18,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916824439] [2025-03-16 13:31:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916824439] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697903961] [2025-03-16 13:31:19,303 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:19,305 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-16 13:31:19,411 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-03-16 13:31:20,056 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 13:31:20,056 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:20,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:20,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-16 13:31:20,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:20,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:31:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:21,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:21,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:21,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697903961] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:21,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 78 [2025-03-16 13:31:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232706030] [2025-03-16 13:31:21,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:21,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-03-16 13:31:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:21,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-03-16 13:31:21,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2025-03-16 13:31:21,611 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 78 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 78 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:22,478 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2025-03-16 13:31:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-16 13:31:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 78 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2025-03-16 13:31:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:22,479 INFO L225 Difference]: With dead ends: 82 [2025-03-16 13:31:22,479 INFO L226 Difference]: Without dead ends: 80 [2025-03-16 13:31:22,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=5927, Unknown=0, NotChecked=0, Total=6162 [2025-03-16 13:31:22,480 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:22,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 976 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2936 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:31:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-16 13:31:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2025-03-16 13:31:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2025-03-16 13:31:22,492 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2025-03-16 13:31:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:22,492 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2025-03-16 13:31:22,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 78 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2025-03-16 13:31:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-03-16 13:31:22,493 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:22,493 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1] [2025-03-16 13:31:22,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-16 13:31:22,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:22,694 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:22,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1720009373, now seen corresponding path program 29 times [2025-03-16 13:31:22,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:22,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827438023] [2025-03-16 13:31:22,695 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:22,710 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 78 statements into 19 equivalence classes. [2025-03-16 13:31:22,739 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 13:31:22,740 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2025-03-16 13:31:22,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827438023] [2025-03-16 13:31:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827438023] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271187999] [2025-03-16 13:31:23,252 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:23,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:23,254 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:23,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-16 13:31:23,359 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 78 statements into 19 equivalence classes. [2025-03-16 13:31:23,692 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 13:31:23,692 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2025-03-16 13:31:23,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:23,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 13:31:23,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:24,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271187999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:24,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:24,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 59 [2025-03-16 13:31:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418290698] [2025-03-16 13:31:24,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:24,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-03-16 13:31:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:24,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-03-16 13:31:24,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 13:31:24,628 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:24,913 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2025-03-16 13:31:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-16 13:31:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2025-03-16 13:31:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:24,914 INFO L225 Difference]: With dead ends: 146 [2025-03-16 13:31:24,914 INFO L226 Difference]: Without dead ends: 86 [2025-03-16 13:31:24,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 100 SyntacticMatches, 37 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2025-03-16 13:31:24,914 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:24,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 237 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:31:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-16 13:31:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2025-03-16 13:31:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2025-03-16 13:31:24,926 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2025-03-16 13:31:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:24,926 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2025-03-16 13:31:24,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2025-03-16 13:31:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 13:31:24,926 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:24,926 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1] [2025-03-16 13:31:24,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-16 13:31:25,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-16 13:31:25,127 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:25,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1617510280, now seen corresponding path program 30 times [2025-03-16 13:31:25,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:25,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556202685] [2025-03-16 13:31:25,127 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:25,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:25,137 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 79 statements into 19 equivalence classes. [2025-03-16 13:31:25,181 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 13:31:25,181 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 13:31:25,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 408 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:26,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556202685] [2025-03-16 13:31:26,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556202685] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:26,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283921111] [2025-03-16 13:31:26,172 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:26,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:26,174 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:26,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-16 13:31:26,284 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 79 statements into 19 equivalence classes. [2025-03-16 13:31:26,859 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 13:31:26,859 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 13:31:26,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:26,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-03-16 13:31:26,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:27,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:31:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:28,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:28,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:28,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283921111] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:28,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2025-03-16 13:31:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170929372] [2025-03-16 13:31:28,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:28,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2025-03-16 13:31:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:28,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2025-03-16 13:31:28,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=9513, Unknown=0, NotChecked=0, Total=10100 [2025-03-16 13:31:28,985 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:31,506 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2025-03-16 13:31:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-16 13:31:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-16 13:31:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:31,507 INFO L225 Difference]: With dead ends: 155 [2025-03-16 13:31:31,507 INFO L226 Difference]: Without dead ends: 90 [2025-03-16 13:31:31,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5205 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1359, Invalid=20103, Unknown=0, NotChecked=0, Total=21462 [2025-03-16 13:31:31,508 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 3702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:31,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1161 Invalid, 3702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-16 13:31:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-16 13:31:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2025-03-16 13:31:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2025-03-16 13:31:31,521 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2025-03-16 13:31:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:31,521 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2025-03-16 13:31:31,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.099009900990099) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2025-03-16 13:31:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-16 13:31:31,521 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:31,521 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1] [2025-03-16 13:31:31,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-16 13:31:31,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:31,722 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:31,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1269101428, now seen corresponding path program 31 times [2025-03-16 13:31:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952430654] [2025-03-16 13:31:31,722 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:31,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-16 13:31:31,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 13:31:31,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:31,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952430654] [2025-03-16 13:31:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952430654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993600095] [2025-03-16 13:31:32,746 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:32,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:32,748 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-16 13:31:32,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-16 13:31:32,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 13:31:32,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:32,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:32,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 129 conjuncts are in the unsatisfiable core [2025-03-16 13:31:32,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:33,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:31:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:34,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:35,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:35,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993600095] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:35,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2025-03-16 13:31:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194636883] [2025-03-16 13:31:35,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:35,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2025-03-16 13:31:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:35,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2025-03-16 13:31:35,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=10779, Unknown=0, NotChecked=0, Total=11130 [2025-03-16 13:31:35,433 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 106 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:36,716 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2025-03-16 13:31:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 13:31:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 106 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2025-03-16 13:31:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:36,717 INFO L225 Difference]: With dead ends: 90 [2025-03-16 13:31:36,717 INFO L226 Difference]: Without dead ends: 88 [2025-03-16 13:31:36,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=360, Invalid=10982, Unknown=0, NotChecked=0, Total=11342 [2025-03-16 13:31:36,718 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 4436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:36,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1446 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-16 13:31:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-16 13:31:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2025-03-16 13:31:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2025-03-16 13:31:36,730 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2025-03-16 13:31:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:36,730 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2025-03-16 13:31:36,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 106 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2025-03-16 13:31:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-03-16 13:31:36,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:36,730 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2025-03-16 13:31:36,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-16 13:31:36,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:36,931 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:36,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:36,931 INFO L85 PathProgramCache]: Analyzing trace with hash 797335965, now seen corresponding path program 32 times [2025-03-16 13:31:36,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:36,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796371584] [2025-03-16 13:31:36,931 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:36,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:36,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-03-16 13:31:36,951 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-16 13:31:36,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:36,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:37,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:37,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796371584] [2025-03-16 13:31:37,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796371584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:37,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493849198] [2025-03-16 13:31:37,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:37,627 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:37,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-16 13:31:37,772 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-03-16 13:31:37,807 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-16 13:31:37,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:37,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:37,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 13:31:37,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:38,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493849198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:38,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2025-03-16 13:31:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203332180] [2025-03-16 13:31:38,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:38,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2025-03-16 13:31:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:38,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2025-03-16 13:31:38,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=3385, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:31:38,912 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:39,225 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2025-03-16 13:31:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 13:31:39,225 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2025-03-16 13:31:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:39,226 INFO L225 Difference]: With dead ends: 160 [2025-03-16 13:31:39,226 INFO L226 Difference]: Without dead ends: 94 [2025-03-16 13:31:39,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 109 SyntacticMatches, 40 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1747, Invalid=5735, Unknown=0, NotChecked=0, Total=7482 [2025-03-16 13:31:39,226 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 222 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:39,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 186 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:31:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-16 13:31:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2025-03-16 13:31:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2025-03-16 13:31:39,239 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2025-03-16 13:31:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:39,239 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2025-03-16 13:31:39,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2025-03-16 13:31:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-16 13:31:39,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:39,239 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1] [2025-03-16 13:31:39,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-16 13:31:39,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-16 13:31:39,440 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:39,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 243286920, now seen corresponding path program 33 times [2025-03-16 13:31:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:39,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198667979] [2025-03-16 13:31:39,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:39,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:39,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 21 equivalence classes. [2025-03-16 13:31:39,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 87 of 87 statements. [2025-03-16 13:31:39,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-16 13:31:39,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 513 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198667979] [2025-03-16 13:31:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198667979] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102070939] [2025-03-16 13:31:40,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:40,958 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:40,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-16 13:31:41,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 21 equivalence classes. [2025-03-16 13:31:43,842 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 87 of 87 statements. [2025-03-16 13:31:43,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-16 13:31:43,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:43,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-03-16 13:31:43,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:44,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-16 13:31:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:45,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:46,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:46,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102070939] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:46,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:46,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 113 [2025-03-16 13:31:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104348400] [2025-03-16 13:31:46,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:46,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2025-03-16 13:31:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:46,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2025-03-16 13:31:46,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2025-03-16 13:31:46,506 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:49,180 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2025-03-16 13:31:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-03-16 13:31:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2025-03-16 13:31:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:49,181 INFO L225 Difference]: With dead ends: 169 [2025-03-16 13:31:49,181 INFO L226 Difference]: Without dead ends: 98 [2025-03-16 13:31:49,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4172 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1136, Invalid=19456, Unknown=0, NotChecked=0, Total=20592 [2025-03-16 13:31:49,182 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 4880 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:49,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1460 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4880 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 13:31:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-16 13:31:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2025-03-16 13:31:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2025-03-16 13:31:49,196 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2025-03-16 13:31:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:49,197 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2025-03-16 13:31:49,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2025-03-16 13:31:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-16 13:31:49,197 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:49,197 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1] [2025-03-16 13:31:49,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:49,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-16 13:31:49,398 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:49,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1437536884, now seen corresponding path program 34 times [2025-03-16 13:31:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360792994] [2025-03-16 13:31:49,398 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:49,409 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-16 13:31:49,437 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 13:31:49,437 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:49,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:50,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360792994] [2025-03-16 13:31:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360792994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584769378] [2025-03-16 13:31:50,485 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:50,487 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:50,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-16 13:31:50,624 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-16 13:31:51,476 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 13:31:51,476 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:51,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:51,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-16 13:31:51,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:52,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:31:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:53,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:53,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:31:53,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-16 13:31:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584769378] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:53,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 94 [2025-03-16 13:31:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659726967] [2025-03-16 13:31:53,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:53,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2025-03-16 13:31:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:53,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2025-03-16 13:31:53,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2025-03-16 13:31:53,702 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 94 states, 94 states have (on average 1.925531914893617) internal successors, (181), 94 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:54,937 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2025-03-16 13:31:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:31:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.925531914893617) internal successors, (181), 94 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2025-03-16 13:31:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:54,937 INFO L225 Difference]: With dead ends: 98 [2025-03-16 13:31:54,937 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 13:31:54,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=283, Invalid=8647, Unknown=0, NotChecked=0, Total=8930 [2025-03-16 13:31:54,938 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 4548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:54,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1529 Invalid, 4548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-16 13:31:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 13:31:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2025-03-16 13:31:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2025-03-16 13:31:54,953 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2025-03-16 13:31:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:54,953 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2025-03-16 13:31:54,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.925531914893617) internal successors, (181), 94 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:31:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2025-03-16 13:31:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-16 13:31:54,953 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:54,953 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1] [2025-03-16 13:31:54,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-16 13:31:55,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-16 13:31:55,154 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:55,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -541532003, now seen corresponding path program 35 times [2025-03-16 13:31:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:55,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170458016] [2025-03-16 13:31:55,154 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:55,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:55,168 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 94 statements into 23 equivalence classes. [2025-03-16 13:31:55,193 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 13:31:55,193 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2025-03-16 13:31:55,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170458016] [2025-03-16 13:31:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170458016] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228619258] [2025-03-16 13:31:55,909 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:55,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:55,911 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:55,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-16 13:31:56,044 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 94 statements into 23 equivalence classes. [2025-03-16 13:31:56,857 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 13:31:56,858 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2025-03-16 13:31:56,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:56,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 13:31:56,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:57,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:31:58,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228619258] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:58,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:58,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 71 [2025-03-16 13:31:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301741436] [2025-03-16 13:31:58,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:58,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 13:31:58,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:58,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 13:31:58,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:31:58,083 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)