./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c --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-crafted/zero_sum_const_m3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:43:23,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:43:23,939 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:43:23,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:43:23,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:43:23,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:43:23,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:43:23,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:43:23,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:43:23,966 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:43:23,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:43:23,967 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:43:23,967 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:43:23,967 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:43:23,967 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:43:23,968 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:43:23,968 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:43:23,969 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:43:23,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:43:23,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:43:23,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:43:23,970 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 -> bd654f01b412711828f8177df5f8f7c2933e3d7436939e6c61fdcced19c9515c [2025-03-16 13:43:24,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:43:24,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:43:24,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:43:24,191 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:43:24,191 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:43:24,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-03-16 13:43:25,342 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2dfdb9d/f072339561d446e9b9d74df3142f9b9b/FLAG29a7d29a9 [2025-03-16 13:43:25,554 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:43:25,555 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m3.c [2025-03-16 13:43:25,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2dfdb9d/f072339561d446e9b9d74df3142f9b9b/FLAG29a7d29a9 [2025-03-16 13:43:25,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2dfdb9d/f072339561d446e9b9d74df3142f9b9b [2025-03-16 13:43:25,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:43:25,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:43:25,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:43:25,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:43:25,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:43:25,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:43:25" (1/1) ... [2025-03-16 13:43:25,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfa1513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:25, skipping insertion in model container [2025-03-16 13:43:25,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:43:25" (1/1) ... [2025-03-16 13:43:25,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:43:26,014 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-crafted/zero_sum_const_m3.c[408,421] [2025-03-16 13:43:26,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:43:26,032 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:43:26,039 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-crafted/zero_sum_const_m3.c[408,421] [2025-03-16 13:43:26,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:43:26,063 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:43:26,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26 WrapperNode [2025-03-16 13:43:26,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:43:26,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:43:26,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:43:26,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:43:26,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,087 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2025-03-16 13:43:26,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:43:26,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:43:26,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:43:26,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:43:26,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,097 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,108 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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 13:43:26,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,113 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:43:26,121 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:43:26,121 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:43:26,121 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:43:26,123 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (1/1) ... [2025-03-16 13:43:26,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:43:26,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:26,150 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 13:43:26,155 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 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:43:26,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:43:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:43:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:43:26,227 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:43:26,229 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:43:26,343 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 13:43:26,343 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:43:26,349 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:43:26,349 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:43:26,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:43:26 BoogieIcfgContainer [2025-03-16 13:43:26,349 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:43:26,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:43:26,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:43:26,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:43:26,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:43:25" (1/3) ... [2025-03-16 13:43:26,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cef761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:43:26, skipping insertion in model container [2025-03-16 13:43:26,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:43:26" (2/3) ... [2025-03-16 13:43:26,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cef761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:43:26, skipping insertion in model container [2025-03-16 13:43:26,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:43:26" (3/3) ... [2025-03-16 13:43:26,356 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2025-03-16 13:43:26,365 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:43:26,366 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m3.c that has 1 procedures, 16 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-16 13:43:26,403 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:43:26,413 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;@2f218c61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:43:26,413 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:43:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 13:43:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:43:26,419 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:26,419 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:26,419 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:26,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash -845513108, now seen corresponding path program 1 times [2025-03-16 13:43:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:26,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365991122] [2025-03-16 13:43:26,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:43:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:26,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:43:26,489 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:43:26,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:26,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:26,623 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 13:43:26,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:26,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365991122] [2025-03-16 13:43:26,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365991122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:43:26,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:43:26,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:43:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770192449] [2025-03-16 13:43:26,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:43:26,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:43:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:26,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:43:26,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:43:26,648 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 13:43:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:26,698 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2025-03-16 13:43:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:43:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 13:43:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:26,705 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:43:26,705 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:43:26,708 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 13:43:26,712 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:26,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:43:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:43:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:43:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 13:43:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-03-16 13:43:26,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 11 [2025-03-16 13:43:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:26,733 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-03-16 13:43:26,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 13:43:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-03-16 13:43:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 13:43:26,733 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:26,733 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:26,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:43:26,734 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:26,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1067269911, now seen corresponding path program 1 times [2025-03-16 13:43:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:26,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005754734] [2025-03-16 13:43:26,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:43:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:26,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 13:43:26,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 13:43:26,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:26,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:43:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005754734] [2025-03-16 13:43:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005754734] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:43:26,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:43:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:43:26,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132341354] [2025-03-16 13:43:26,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:43:26,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:43:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:26,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:43:26,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:43:26,802 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 13:43:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:26,845 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2025-03-16 13:43:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:43:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) Word has length 12 [2025-03-16 13:43:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:26,846 INFO L225 Difference]: With dead ends: 27 [2025-03-16 13:43:26,846 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 13:43:26,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:43:26,847 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:26,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:43:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 13:43:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 13:43:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 13:43:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-03-16 13:43:26,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2025-03-16 13:43:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:26,853 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-03-16 13:43:26,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 13:43:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-03-16 13:43:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:43:26,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:26,854 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:26,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:43:26,854 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:26,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2131088553, now seen corresponding path program 1 times [2025-03-16 13:43:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:26,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205788162] [2025-03-16 13:43:26,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:43:26,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:26,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:43:26,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:43:26,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:26,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:43:26,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:26,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205788162] [2025-03-16 13:43:26,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205788162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:26,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112244032] [2025-03-16 13:43:26,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:43:26,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:26,969 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 13:43:26,970 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 13:43:27,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:43:27,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:43:27,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:27,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:27,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:43:27,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:43:27,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:43:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112244032] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:27,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:27,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 13:43:27,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100062587] [2025-03-16 13:43:27,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:27,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 13:43:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:27,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 13:43:27,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:43:27,110 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 13:43:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:27,155 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2025-03-16 13:43:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:43:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 13:43:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:27,155 INFO L225 Difference]: With dead ends: 35 [2025-03-16 13:43:27,155 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 13:43:27,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:43:27,156 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:27,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:43:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 13:43:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-16 13:43:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 13:43:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2025-03-16 13:43:27,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2025-03-16 13:43:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:27,160 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2025-03-16 13:43:27,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 13:43:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2025-03-16 13:43:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:43:27,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:27,162 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:27,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:27,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:27,363 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:27,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1841849420, now seen corresponding path program 2 times [2025-03-16 13:43:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:27,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131735526] [2025-03-16 13:43:27,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:27,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:27,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:43:27,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:43:27,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:27,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:43:27,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131735526] [2025-03-16 13:43:27,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131735526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954994637] [2025-03-16 13:43:27,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:27,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:27,492 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 13:43:27,493 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 13:43:27,528 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:43:27,544 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:43:27,545 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:27,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:27,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:43:27,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:43:27,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 13:43:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954994637] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:27,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:27,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-16 13:43:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816893619] [2025-03-16 13:43:27,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:27,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 13:43:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:27,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 13:43:27,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:43:27,607 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 13:43:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:27,670 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2025-03-16 13:43:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:43:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 13:43:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:27,670 INFO L225 Difference]: With dead ends: 39 [2025-03-16 13:43:27,670 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:43:27,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:43:27,672 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:27,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:43:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 13:43:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 13:43:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2025-03-16 13:43:27,679 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2025-03-16 13:43:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:27,679 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2025-03-16 13:43:27,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 13:43:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2025-03-16 13:43:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 13:43:27,680 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:27,680 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:27,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:27,885 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,SelfDestructingSolverStorable3 [2025-03-16 13:43:27,885 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:27,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash -820064244, now seen corresponding path program 3 times [2025-03-16 13:43:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:27,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299305117] [2025-03-16 13:43:27,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:27,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:43:27,916 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:43:27,916 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:43:27,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299305117] [2025-03-16 13:43:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299305117] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711731668] [2025-03-16 13:43:29,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:29,226 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 13:43:29,227 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 13:43:29,258 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:43:29,274 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:43:29,274 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:43:29,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:29,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 13:43:29,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:29,306 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 15 treesize of output 1 [2025-03-16 13:43:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:29,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:43:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711731668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:30,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:30,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2025-03-16 13:43:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108156920] [2025-03-16 13:43:30,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:30,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-16 13:43:30,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:30,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-16 13:43:30,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:43:30,415 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 13:43:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:30,985 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2025-03-16 13:43:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:43:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 25 [2025-03-16 13:43:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:30,987 INFO L225 Difference]: With dead ends: 45 [2025-03-16 13:43:30,987 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 13:43:30,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=2782, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:43:30,989 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:30,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:43:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 13:43:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-03-16 13:43:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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 13:43:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2025-03-16 13:43:30,994 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2025-03-16 13:43:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:30,995 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2025-03-16 13:43:30,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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 13:43:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2025-03-16 13:43:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:43:30,995 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:30,995 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:31,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:31,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:31,200 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:31,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash 347843959, now seen corresponding path program 4 times [2025-03-16 13:43:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:31,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353379495] [2025-03-16 13:43:31,200 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:31,220 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:43:31,226 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-16 13:43:31,226 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:31,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:43:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353379495] [2025-03-16 13:43:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353379495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684732339] [2025-03-16 13:43:31,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:31,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:31,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:31,282 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 13:43:31,283 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 13:43:31,308 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:43:31,318 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-16 13:43:31,318 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:31,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:31,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:43:31,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:43:31,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:43:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684732339] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:31,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:31,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-16 13:43:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984454956] [2025-03-16 13:43:31,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:31,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:43:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:31,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:43:31,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:43:31,402 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 13:43:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:31,525 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2025-03-16 13:43:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:43:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) Word has length 26 [2025-03-16 13:43:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:31,526 INFO L225 Difference]: With dead ends: 85 [2025-03-16 13:43:31,526 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 13:43:31,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:43:31,526 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:31,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 13:43:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-03-16 13:43:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 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 13:43:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-03-16 13:43:31,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 26 [2025-03-16 13:43:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:31,531 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-03-16 13:43:31,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 13:43:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-03-16 13:43:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:43:31,531 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:31,532 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:31,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:31,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:31,732 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:31,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1269346996, now seen corresponding path program 5 times [2025-03-16 13:43:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722064557] [2025-03-16 13:43:31,733 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:31,738 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 13:43:31,746 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:43:31,746 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:43:31,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:43:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722064557] [2025-03-16 13:43:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722064557] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305237640] [2025-03-16 13:43:31,817 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:31,819 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 13:43:31,821 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 13:43:31,850 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-16 13:43:31,871 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:43:31,871 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:43:31,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:31,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:43:31,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:43:31,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 13:43:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305237640] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:31,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:31,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-16 13:43:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171044385] [2025-03-16 13:43:31,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:31,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:43:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:31,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:43:31,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:43:31,960 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 13:43:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:32,071 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2025-03-16 13:43:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:43:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) Word has length 27 [2025-03-16 13:43:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:32,071 INFO L225 Difference]: With dead ends: 48 [2025-03-16 13:43:32,071 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 13:43:32,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:43:32,072 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:32,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 13:43:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-16 13:43:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 13:43:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-03-16 13:43:32,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2025-03-16 13:43:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:32,079 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-03-16 13:43:32,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 13:43:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-03-16 13:43:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-16 13:43:32,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:32,081 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:32,087 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 13:43:32,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:32,285 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:32,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1887935049, now seen corresponding path program 6 times [2025-03-16 13:43:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445936001] [2025-03-16 13:43:32,286 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:32,294 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-16 13:43:32,352 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 13:43:32,352 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:43:32,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445936001] [2025-03-16 13:43:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445936001] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108964304] [2025-03-16 13:43:34,404 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:34,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:34,406 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 13:43:34,408 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 13:43:34,437 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-16 13:43:34,456 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-16 13:43:34,456 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:43:34,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:34,457 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-03-16 13:43:34,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:34,523 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 15 treesize of output 1 [2025-03-16 13:43:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:35,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:43:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108964304] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:36,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 73 [2025-03-16 13:43:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210589761] [2025-03-16 13:43:36,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:36,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-16 13:43:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:36,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-16 13:43:36,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5001, Unknown=0, NotChecked=0, Total=5256 [2025-03-16 13:43:36,464 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 13:43:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:37,718 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2025-03-16 13:43:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 13:43:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 32 [2025-03-16 13:43:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:37,720 INFO L225 Difference]: With dead ends: 75 [2025-03-16 13:43:37,720 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:43:37,722 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=358, Invalid=7124, Unknown=0, NotChecked=0, Total=7482 [2025-03-16 13:43:37,723 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:37,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:43:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:43:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2025-03-16 13:43:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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 13:43:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2025-03-16 13:43:37,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 32 [2025-03-16 13:43:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:37,731 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2025-03-16 13:43:37,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 13:43:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2025-03-16 13:43:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:43:37,732 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:37,732 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:37,739 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 13:43:37,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:37,936 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:37,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1603587372, now seen corresponding path program 7 times [2025-03-16 13:43:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819659068] [2025-03-16 13:43:37,936 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:43:37,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:37,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:43:37,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:43:37,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:37,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:43:38,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819659068] [2025-03-16 13:43:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819659068] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721349433] [2025-03-16 13:43:38,025 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:43:38,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:38,027 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 13:43:38,028 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 13:43:38,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:43:38,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:43:38,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:43:38,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:38,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:43:38,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:43:38,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:43:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721349433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:38,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:38,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-16 13:43:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894326791] [2025-03-16 13:43:38,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:38,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:43:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:38,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:43:38,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:43:38,210 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 13:43:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:38,362 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2025-03-16 13:43:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:43:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 33 [2025-03-16 13:43:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:38,363 INFO L225 Difference]: With dead ends: 107 [2025-03-16 13:43:38,363 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 13:43:38,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:43:38,364 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:38,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 13:43:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-03-16 13:43:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 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 13:43:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2025-03-16 13:43:38,372 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2025-03-16 13:43:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:38,374 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2025-03-16 13:43:38,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 13:43:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2025-03-16 13:43:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:43:38,374 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:38,374 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:38,380 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 13:43:38,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:38,575 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:38,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1233955785, now seen corresponding path program 8 times [2025-03-16 13:43:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:38,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657166702] [2025-03-16 13:43:38,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:38,580 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:43:38,584 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:43:38,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:38,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:43:38,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657166702] [2025-03-16 13:43:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657166702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853664251] [2025-03-16 13:43:38,663 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:43:38,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:38,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:38,665 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 13:43:38,667 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 13:43:38,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:43:38,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:43:38,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:43:38,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:38,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:43:38,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:43:38,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:43:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853664251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:38,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:38,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-16 13:43:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885522432] [2025-03-16 13:43:38,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:38,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:43:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:38,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:43:38,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:43:38,856 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 13:43:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:38,996 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-03-16 13:43:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:43:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 13:43:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:38,997 INFO L225 Difference]: With dead ends: 59 [2025-03-16 13:43:38,997 INFO L226 Difference]: Without dead ends: 40 [2025-03-16 13:43:38,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:43:38,998 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:38,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-16 13:43:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-16 13:43:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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 13:43:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2025-03-16 13:43:39,004 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2025-03-16 13:43:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:39,005 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2025-03-16 13:43:39,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 13:43:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2025-03-16 13:43:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 13:43:39,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:39,005 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:39,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:39,205 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,SelfDestructingSolverStorable9 [2025-03-16 13:43:39,206 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:39,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1679570516, now seen corresponding path program 9 times [2025-03-16 13:43:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:39,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825339702] [2025-03-16 13:43:39,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:39,212 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-03-16 13:43:39,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:43:39,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:43:39,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:43:41,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825339702] [2025-03-16 13:43:41,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825339702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355919155] [2025-03-16 13:43:41,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:43:41,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:41,591 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 13:43:41,592 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 13:43:41,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 3 equivalence classes. [2025-03-16 13:43:41,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:43:41,648 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:43:41,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:41,650 WARN L254 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 127 conjuncts are in the unsatisfiable core [2025-03-16 13:43:41,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:41,806 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 15 treesize of output 1 [2025-03-16 13:43:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:43,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355919155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:45,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:45,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 37] total 103 [2025-03-16 13:43:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669290349] [2025-03-16 13:43:45,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:45,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-03-16 13:43:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:45,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-03-16 13:43:45,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=9810, Unknown=0, NotChecked=0, Total=10506 [2025-03-16 13:43:45,635 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 13:43:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:54,160 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2025-03-16 13:43:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2025-03-16 13:43:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 13:43:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:54,162 INFO L225 Difference]: With dead ends: 167 [2025-03-16 13:43:54,162 INFO L226 Difference]: Without dead ends: 157 [2025-03-16 13:43:54,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7797 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2342, Invalid=30600, Unknown=0, NotChecked=0, Total=32942 [2025-03-16 13:43:54,168 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:54,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 5165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-03-16 13:43:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-03-16 13:43:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 85. [2025-03-16 13:43:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 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 13:43:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2025-03-16 13:43:54,202 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 39 [2025-03-16 13:43:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:54,203 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2025-03-16 13:43:54,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 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 13:43:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2025-03-16 13:43:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 13:43:54,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:54,203 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:54,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 13:43:54,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:54,404 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:54,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -591690825, now seen corresponding path program 10 times [2025-03-16 13:43:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:54,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723143803] [2025-03-16 13:43:54,404 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:54,410 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-16 13:43:54,414 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 40 statements. [2025-03-16 13:43:54,414 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:54,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-16 13:43:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723143803] [2025-03-16 13:43:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723143803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800945243] [2025-03-16 13:43:54,501 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:43:54,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:54,503 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 13:43:54,504 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 13:43:54,538 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-16 13:43:54,556 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 40 statements. [2025-03-16 13:43:54,556 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:43:54,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:54,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:43:54,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-16 13:43:54,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-16 13:43:54,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800945243] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:54,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:54,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-16 13:43:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740166879] [2025-03-16 13:43:54,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:54,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:43:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:54,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:43:54,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:43:54,705 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 13:43:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:54,872 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2025-03-16 13:43:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:43:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 40 [2025-03-16 13:43:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:54,873 INFO L225 Difference]: With dead ends: 172 [2025-03-16 13:43:54,873 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 13:43:54,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:43:54,873 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:54,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 13:43:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2025-03-16 13:43:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 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 13:43:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2025-03-16 13:43:54,886 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2025-03-16 13:43:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:54,886 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2025-03-16 13:43:54,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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 13:43:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2025-03-16 13:43:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 13:43:54,886 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:54,886 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:54,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:55,089 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,SelfDestructingSolverStorable11 [2025-03-16 13:43:55,089 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:55,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1191670036, now seen corresponding path program 11 times [2025-03-16 13:43:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007260107] [2025-03-16 13:43:55,089 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:55,094 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 4 equivalence classes. [2025-03-16 13:43:55,102 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:43:55,102 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:43:55,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007260107] [2025-03-16 13:43:55,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007260107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100289385] [2025-03-16 13:43:55,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:43:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:55,210 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 13:43:55,211 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 13:43:55,244 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 4 equivalence classes. [2025-03-16 13:43:55,338 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:43:55,338 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:43:55,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:55,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:43:55,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:55,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:43:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:43:55,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100289385] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:43:55,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:43:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-16 13:43:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554744007] [2025-03-16 13:43:55,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:43:55,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:43:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:43:55,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:43:55,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:43:55,489 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 13:43:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:43:55,680 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2025-03-16 13:43:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:43:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 41 [2025-03-16 13:43:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:43:55,681 INFO L225 Difference]: With dead ends: 70 [2025-03-16 13:43:55,681 INFO L226 Difference]: Without dead ends: 47 [2025-03-16 13:43:55,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:43:55,682 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:43:55,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:43:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-16 13:43:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-03-16 13:43:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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 13:43:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2025-03-16 13:43:55,700 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2025-03-16 13:43:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:43:55,700 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2025-03-16 13:43:55,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 13:43:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2025-03-16 13:43:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 13:43:55,701 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:43:55,701 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:43:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 13:43:55,907 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,SelfDestructingSolverStorable12 [2025-03-16 13:43:55,907 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:43:55,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:43:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash -937887721, now seen corresponding path program 12 times [2025-03-16 13:43:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:43:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111121190] [2025-03-16 13:43:55,908 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:43:55,913 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-03-16 13:43:55,961 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:43:55,962 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:43:55,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:43:58,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:43:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111121190] [2025-03-16 13:43:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111121190] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:43:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539870023] [2025-03-16 13:43:58,994 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:43:58,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:43:58,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:43:58,996 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 13:43:58,998 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 13:43:59,031 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 4 equivalence classes. [2025-03-16 13:43:59,056 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:43:59,056 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 13:43:59,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:43:59,058 WARN L254 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 143 conjuncts are in the unsatisfiable core [2025-03-16 13:43:59,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:43:59,103 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 19 treesize of output 1 [2025-03-16 13:44:00,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:44:00,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 14 [2025-03-16 13:44:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:44:00,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:44:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539870023] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:03,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40, 40] total 117 [2025-03-16 13:44:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614349209] [2025-03-16 13:44:03,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:03,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2025-03-16 13:44:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:03,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2025-03-16 13:44:03,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=12708, Unknown=0, NotChecked=0, Total=13572 [2025-03-16 13:44:03,692 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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 13:44:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:16,493 INFO L93 Difference]: Finished difference Result 212 states and 279 transitions. [2025-03-16 13:44:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2025-03-16 13:44:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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 46 [2025-03-16 13:44:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:16,494 INFO L225 Difference]: With dead ends: 212 [2025-03-16 13:44:16,494 INFO L226 Difference]: Without dead ends: 209 [2025-03-16 13:44:16,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8179 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=3345, Invalid=31811, Unknown=0, NotChecked=0, Total=35156 [2025-03-16 13:44:16,496 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 5692 mSolverCounterSat, 956 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 6650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 5692 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:16,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 6650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 5692 Invalid, 2 Unknown, 0 Unchecked, 3.4s Time] [2025-03-16 13:44:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-16 13:44:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 166. [2025-03-16 13:44:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.290909090909091) internal successors, (213), 165 states have internal predecessors, (213), 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 13:44:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2025-03-16 13:44:16,550 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 46 [2025-03-16 13:44:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:16,550 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2025-03-16 13:44:16,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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 13:44:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2025-03-16 13:44:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 13:44:16,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:16,551 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:16,557 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 13:44:16,751 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,SelfDestructingSolverStorable13 [2025-03-16 13:44:16,752 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:16,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash -598643177, now seen corresponding path program 13 times [2025-03-16 13:44:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:16,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642582599] [2025-03-16 13:44:16,752 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:44:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:16,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 13:44:16,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 13:44:16,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:44:16,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-16 13:44:16,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:16,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642582599] [2025-03-16 13:44:16,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642582599] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:16,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131745446] [2025-03-16 13:44:16,924 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:44:16,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:16,926 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 13:44:16,928 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 13:44:16,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 13:44:16,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 13:44:16,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:44:16,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:16,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:44:16,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-16 13:44:17,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-16 13:44:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131745446] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:17,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-16 13:44:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697399374] [2025-03-16 13:44:17,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:17,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:44:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:17,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:44:17,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:44:17,163 INFO L87 Difference]: Start difference. First operand 166 states and 213 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 13:44:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:17,478 INFO L93 Difference]: Finished difference Result 246 states and 318 transitions. [2025-03-16 13:44:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:44:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 48 [2025-03-16 13:44:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:17,479 INFO L225 Difference]: With dead ends: 246 [2025-03-16 13:44:17,479 INFO L226 Difference]: Without dead ends: 158 [2025-03-16 13:44:17,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:44:17,479 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:17,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 12 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:44:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-03-16 13:44:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2025-03-16 13:44:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 140 states have internal predecessors, (174), 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 13:44:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2025-03-16 13:44:17,522 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 48 [2025-03-16 13:44:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:17,523 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2025-03-16 13:44:17,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 13:44:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2025-03-16 13:44:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 13:44:17,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:17,523 INFO L218 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:17,529 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 13:44:17,723 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,SelfDestructingSolverStorable14 [2025-03-16 13:44:17,724 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:17,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1819311060, now seen corresponding path program 14 times [2025-03-16 13:44:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:17,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247169990] [2025-03-16 13:44:17,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:44:17,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:17,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-16 13:44:17,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 13:44:17,734 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:44:17,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-16 13:44:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247169990] [2025-03-16 13:44:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247169990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117179460] [2025-03-16 13:44:17,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:44:17,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:17,875 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 13:44:17,877 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 13:44:17,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-03-16 13:44:17,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 13:44:17,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:44:17,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:17,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:44:17,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:44:18,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:44:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:44:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117179460] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:44:18,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:44:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2025-03-16 13:44:18,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636774764] [2025-03-16 13:44:18,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:44:18,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:44:18,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:44:18,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:44:18,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:44:18,110 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 13:44:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:44:18,311 INFO L93 Difference]: Finished difference Result 180 states and 218 transitions. [2025-03-16 13:44:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:44:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 49 [2025-03-16 13:44:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:44:18,312 INFO L225 Difference]: With dead ends: 180 [2025-03-16 13:44:18,312 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:44:18,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:44:18,313 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:44:18,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:44:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:44:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-03-16 13:44:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 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 13:44:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2025-03-16 13:44:18,332 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 49 [2025-03-16 13:44:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:44:18,332 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2025-03-16 13:44:18,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 13:44:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2025-03-16 13:44:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 13:44:18,332 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:44:18,332 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:44:18,338 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 13:44:18,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:18,533 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:44:18,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:44:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431436, now seen corresponding path program 15 times [2025-03-16 13:44:18,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:44:18,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917537442] [2025-03-16 13:44:18,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:44:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:44:18,538 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 4 equivalence classes. [2025-03-16 13:44:18,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:44:18,593 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:44:18,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:44:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:44:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917537442] [2025-03-16 13:44:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917537442] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:44:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591970950] [2025-03-16 13:44:23,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:44:23,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:44:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:44:23,069 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 13:44:23,069 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 13:44:23,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 4 equivalence classes. [2025-03-16 13:44:23,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:44:23,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:44:23,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:44:23,149 WARN L254 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 176 conjuncts are in the unsatisfiable core [2025-03-16 13:44:23,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:44:23,372 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 15 treesize of output 1 [2025-03-16 13:44:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:44:26,200 INFO L312 TraceCheckSpWp]: Computing backward predicates...