./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-programs/partial_mod_count_1.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 a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:27:14,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:27:14,879 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:27:14,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:27:14,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:27:14,904 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:27:14,904 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:27:14,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:27:14,905 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:27:14,905 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:27:14,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:27:14,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:27:14,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:27:14,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:27:14,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:27:14,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:27:14,908 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:27:14,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:27:14,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:27:14,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:27:14,909 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 -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2025-03-08 00:27:15,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:27:15,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:27:15,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:27:15,162 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:27:15,162 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:27:15,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2025-03-08 00:27:16,321 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb065fcf2/9f8c8d93f28e4351a545c2f1fcee173d/FLAG4ea3654d7 [2025-03-08 00:27:16,533 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:27:16,535 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2025-03-08 00:27:16,540 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb065fcf2/9f8c8d93f28e4351a545c2f1fcee173d/FLAG4ea3654d7 [2025-03-08 00:27:16,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb065fcf2/9f8c8d93f28e4351a545c2f1fcee173d [2025-03-08 00:27:16,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:27:16,907 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:27:16,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:27:16,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:27:16,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:27:16,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:27:16" (1/1) ... [2025-03-08 00:27:16,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18185998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:16, skipping insertion in model container [2025-03-08 00:27:16,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:27:16" (1/1) ... [2025-03-08 00:27:16,925 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:27:17,004 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-programs/partial_mod_count_1.c[323,336] [2025-03-08 00:27:17,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:27:17,025 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:27:17,031 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-programs/partial_mod_count_1.c[323,336] [2025-03-08 00:27:17,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:27:17,044 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:27:17,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17 WrapperNode [2025-03-08 00:27:17,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:27:17,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:27:17,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:27:17,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:27:17,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,066 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-03-08 00:27:17,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:27:17,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:27:17,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:27:17,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:27:17,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,080 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-08 00:27:17,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,084 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:27:17,088 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:27:17,088 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:27:17,088 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:27:17,089 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (1/1) ... [2025-03-08 00:27:17,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:27:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:17,117 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) [2025-03-08 00:27:17,122 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 [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:27:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:27:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:27:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:27:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:27:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:27:17,181 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:27:17,183 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:27:17,274 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-08 00:27:17,278 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 00:27:17,278 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:27:17,284 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:27:17,284 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:27:17,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:27:17 BoogieIcfgContainer [2025-03-08 00:27:17,285 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:27:17,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:27:17,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:27:17,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:27:17,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:27:16" (1/3) ... [2025-03-08 00:27:17,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eecf302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:27:17, skipping insertion in model container [2025-03-08 00:27:17,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:27:17" (2/3) ... [2025-03-08 00:27:17,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eecf302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:27:17, skipping insertion in model container [2025-03-08 00:27:17,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:27:17" (3/3) ... [2025-03-08 00:27:17,294 INFO L128 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2025-03-08 00:27:17,303 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:27:17,305 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG partial_mod_count_1.c that has 1 procedures, 15 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 00:27:17,342 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:27:17,350 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;@14b8f7b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:27:17,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:27:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) [2025-03-08 00:27:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-08 00:27:17,356 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:17,357 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:17,357 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:17,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 419935901, now seen corresponding path program 1 times [2025-03-08 00:27:17,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:17,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160164449] [2025-03-08 00:27:17,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:17,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:17,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 00:27:17,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 00:27:17,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:17,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160164449] [2025-03-08 00:27:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160164449] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:27:17,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:27:17,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:27:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689957764] [2025-03-08 00:27:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:27:17,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:27:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:17,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:27:17,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:27:17,600 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-08 00:27:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:17,666 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2025-03-08 00:27:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:27:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2025-03-08 00:27:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:17,672 INFO L225 Difference]: With dead ends: 38 [2025-03-08 00:27:17,673 INFO L226 Difference]: Without dead ends: 22 [2025-03-08 00:27:17,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:27:17,678 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:17,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:27:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-08 00:27:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2025-03-08 00:27:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2025-03-08 00:27:17,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2025-03-08 00:27:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:17,705 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2025-03-08 00:27:17,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-08 00:27:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2025-03-08 00:27:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 00:27:17,706 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:17,706 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:17,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:27:17,707 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:17,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:17,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1813573396, now seen corresponding path program 1 times [2025-03-08 00:27:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075721289] [2025-03-08 00:27:17,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:17,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 00:27:17,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 00:27:17,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:17,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075721289] [2025-03-08 00:27:17,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075721289] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959783021] [2025-03-08 00:27:17,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:17,846 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) [2025-03-08 00:27:17,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:27:17,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 00:27:17,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 00:27:17,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:17,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:17,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:27:17,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:17,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:17,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959783021] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:17,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:17,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-08 00:27:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638405408] [2025-03-08 00:27:17,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:17,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 00:27:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:17,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 00:27:17,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:27:17,985 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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) [2025-03-08 00:27:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:18,085 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2025-03-08 00:27:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:27:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 [2025-03-08 00:27:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:18,086 INFO L225 Difference]: With dead ends: 54 [2025-03-08 00:27:18,086 INFO L226 Difference]: Without dead ends: 44 [2025-03-08 00:27:18,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:27:18,087 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:18,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:27:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-08 00:27:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 22. [2025-03-08 00:27:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2025-03-08 00:27:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-08 00:27:18,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2025-03-08 00:27:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:18,097 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-08 00:27:18,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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) [2025-03-08 00:27:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-08 00:27:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 00:27:18,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:18,098 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:18,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 00:27:18,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:18,302 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:18,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1506026750, now seen corresponding path program 1 times [2025-03-08 00:27:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:18,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870986196] [2025-03-08 00:27:18,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:18,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 00:27:18,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 00:27:18,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:18,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:18,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870986196] [2025-03-08 00:27:18,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870986196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540012713] [2025-03-08 00:27:18,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:18,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:18,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:18,646 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) [2025-03-08 00:27:18,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:27:18,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 00:27:18,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 00:27:18,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:18,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:18,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 00:27:18,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:18,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:27:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540012713] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:18,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:18,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-03-08 00:27:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122806823] [2025-03-08 00:27:18,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:18,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:27:18,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:18,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:27:18,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:27:18,879 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:19,069 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2025-03-08 00:27:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:27:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-08 00:27:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:19,070 INFO L225 Difference]: With dead ends: 118 [2025-03-08 00:27:19,071 INFO L226 Difference]: Without dead ends: 106 [2025-03-08 00:27:19,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:27:19,072 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 216 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:19,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 61 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:27:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-08 00:27:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 40. [2025-03-08 00:27:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-08 00:27:19,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2025-03-08 00:27:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:19,078 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-08 00:27:19,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-08 00:27:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 00:27:19,079 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:19,079 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:19,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:27:19,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-08 00:27:19,285 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:19,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2535555, now seen corresponding path program 2 times [2025-03-08 00:27:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:19,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607636428] [2025-03-08 00:27:19,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:27:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:19,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-08 00:27:19,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-03-08 00:27:19,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 00:27:19,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-08 00:27:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:19,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607636428] [2025-03-08 00:27:19,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607636428] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:27:19,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:27:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 00:27:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639246296] [2025-03-08 00:27:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:27:19,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 00:27:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:19,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 00:27:19,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 00:27:19,377 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2025-03-08 00:27:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:19,427 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2025-03-08 00:27:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:27:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 38 [2025-03-08 00:27:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:19,428 INFO L225 Difference]: With dead ends: 52 [2025-03-08 00:27:19,428 INFO L226 Difference]: Without dead ends: 50 [2025-03-08 00:27:19,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-03-08 00:27:19,429 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:19,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:27:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-08 00:27:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-08 00:27:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 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) [2025-03-08 00:27:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2025-03-08 00:27:19,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 38 [2025-03-08 00:27:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:19,434 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2025-03-08 00:27:19,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2025-03-08 00:27:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2025-03-08 00:27:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 00:27:19,435 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:19,435 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:19,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 00:27:19,435 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:19,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash -703059696, now seen corresponding path program 1 times [2025-03-08 00:27:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:19,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070566133] [2025-03-08 00:27:19,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:19,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 00:27:19,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:27:19,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:19,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-08 00:27:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070566133] [2025-03-08 00:27:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070566133] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209501040] [2025-03-08 00:27:19,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:27:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:19,908 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) [2025-03-08 00:27:19,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:27:19,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 00:27:19,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 00:27:19,976 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:27:19,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:19,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 00:27:19,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:27:20,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:27:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209501040] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:20,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:20,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2025-03-08 00:27:20,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232711639] [2025-03-08 00:27:20,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:20,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 00:27:20,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:20,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 00:27:20,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 00:27:20,427 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 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) [2025-03-08 00:27:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:20,943 INFO L93 Difference]: Finished difference Result 477 states and 576 transitions. [2025-03-08 00:27:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:27:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-08 00:27:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:20,946 INFO L225 Difference]: With dead ends: 477 [2025-03-08 00:27:20,946 INFO L226 Difference]: Without dead ends: 446 [2025-03-08 00:27:20,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=1277, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 00:27:20,948 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 888 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:20,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 126 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:27:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-08 00:27:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 86. [2025-03-08 00:27:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 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) [2025-03-08 00:27:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2025-03-08 00:27:20,961 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 43 [2025-03-08 00:27:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:20,961 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2025-03-08 00:27:20,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 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) [2025-03-08 00:27:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2025-03-08 00:27:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-08 00:27:20,963 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:20,963 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 12, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:27:20,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 00:27:21,163 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 [2025-03-08 00:27:21,164 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:21,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2076116432, now seen corresponding path program 2 times [2025-03-08 00:27:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449076249] [2025-03-08 00:27:21,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:27:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:21,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-08 00:27:21,216 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:27:21,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:27:21,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-03-08 00:27:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449076249] [2025-03-08 00:27:21,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449076249] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789816398] [2025-03-08 00:27:21,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:27:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:21,721 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) [2025-03-08 00:27:21,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:27:21,770 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-08 00:27:21,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:27:21,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:27:21,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:21,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 00:27:21,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:27:22,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:27:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789816398] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:22,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 53 [2025-03-08 00:27:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341800767] [2025-03-08 00:27:22,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:22,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-08 00:27:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:22,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-08 00:27:22,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=1666, Unknown=0, NotChecked=0, Total=2862 [2025-03-08 00:27:22,903 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:30,927 INFO L93 Difference]: Finished difference Result 1210 states and 1505 transitions. [2025-03-08 00:27:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2025-03-08 00:27:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-08 00:27:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:30,931 INFO L225 Difference]: With dead ends: 1210 [2025-03-08 00:27:30,931 INFO L226 Difference]: Without dead ends: 1161 [2025-03-08 00:27:30,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59421 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=34347, Invalid=88503, Unknown=0, NotChecked=0, Total=122850 [2025-03-08 00:27:30,948 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 1971 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:30,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1971 Valid, 365 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:27:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2025-03-08 00:27:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 163. [2025-03-08 00:27:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 162 states have internal predecessors, (191), 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) [2025-03-08 00:27:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2025-03-08 00:27:30,973 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 79 [2025-03-08 00:27:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:30,973 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2025-03-08 00:27:30,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:27:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2025-03-08 00:27:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2025-03-08 00:27:30,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:30,978 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 24, 22, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-08 00:27:30,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:27:31,178 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 [2025-03-08 00:27:31,179 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:31,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash -409058307, now seen corresponding path program 3 times [2025-03-08 00:27:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:31,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367001123] [2025-03-08 00:27:31,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:27:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:31,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 156 statements into 47 equivalence classes. [2025-03-08 00:27:31,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 156 statements. [2025-03-08 00:27:31,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:27:31,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-08 00:27:31,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:31,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367001123] [2025-03-08 00:27:31,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367001123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:31,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868018310] [2025-03-08 00:27:31,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:27:31,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:31,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:31,412 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) [2025-03-08 00:27:31,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:27:31,480 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 156 statements into 47 equivalence classes. [2025-03-08 00:27:31,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 156 statements. [2025-03-08 00:27:31,496 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:27:31,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:31,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 00:27:31,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-08 00:27:31,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-08 00:27:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868018310] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:33,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:33,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-08 00:27:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610798395] [2025-03-08 00:27:33,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:33,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 00:27:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:33,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 00:27:33,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2025-03-08 00:27:33,101 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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) [2025-03-08 00:27:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:33,263 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2025-03-08 00:27:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:27:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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 156 [2025-03-08 00:27:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:33,265 INFO L225 Difference]: With dead ends: 190 [2025-03-08 00:27:33,265 INFO L226 Difference]: Without dead ends: 188 [2025-03-08 00:27:33,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=644, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:27:33,265 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 122 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:33,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 40 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:27:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-03-08 00:27:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2025-03-08 00:27:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1818181818181819) internal successors, (221), 187 states have internal predecessors, (221), 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) [2025-03-08 00:27:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2025-03-08 00:27:33,285 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 156 [2025-03-08 00:27:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:33,285 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2025-03-08 00:27:33,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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) [2025-03-08 00:27:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2025-03-08 00:27:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2025-03-08 00:27:33,287 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:33,287 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 24, 22, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-08 00:27:33,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:27:33,487 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 [2025-03-08 00:27:33,487 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:33,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:33,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1505071920, now seen corresponding path program 4 times [2025-03-08 00:27:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:33,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308875251] [2025-03-08 00:27:33,488 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:27:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:33,508 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 181 statements into 2 equivalence classes. [2025-03-08 00:27:33,589 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-08 00:27:33,589 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:27:33,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-08 00:27:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308875251] [2025-03-08 00:27:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308875251] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039359398] [2025-03-08 00:27:36,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:27:36,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:36,238 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) [2025-03-08 00:27:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:27:36,324 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 181 statements into 2 equivalence classes. [2025-03-08 00:27:39,454 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-08 00:27:39,455 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:27:39,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:39,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 00:27:39,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:27:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-08 00:27:40,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:27:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-08 00:27:42,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039359398] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:27:42,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:27:42,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2025-03-08 00:27:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835099571] [2025-03-08 00:27:42,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:27:42,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2025-03-08 00:27:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:27:42,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2025-03-08 00:27:42,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9171, Invalid=11709, Unknown=0, NotChecked=0, Total=20880 [2025-03-08 00:27:42,541 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 145 states, 145 states have (on average 2.9586206896551723) internal successors, (429), 144 states have internal predecessors, (429), 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) [2025-03-08 00:27:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:27:47,962 INFO L93 Difference]: Finished difference Result 4722 states and 5682 transitions. [2025-03-08 00:27:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2025-03-08 00:27:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.9586206896551723) internal successors, (429), 144 states have internal predecessors, (429), 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 181 [2025-03-08 00:27:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:27:47,975 INFO L225 Difference]: With dead ends: 4722 [2025-03-08 00:27:47,975 INFO L226 Difference]: Without dead ends: 4607 [2025-03-08 00:27:47,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13300 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2025-03-08 00:27:47,978 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3971 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:27:47,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3971 Valid, 579 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:27:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2025-03-08 00:27:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 332. [2025-03-08 00:27:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 331 states have internal predecessors, (389), 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) [2025-03-08 00:27:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 389 transitions. [2025-03-08 00:27:48,039 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 389 transitions. Word has length 181 [2025-03-08 00:27:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:27:48,039 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 389 transitions. [2025-03-08 00:27:48,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.9586206896551723) internal successors, (429), 144 states have internal predecessors, (429), 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) [2025-03-08 00:27:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 389 transitions. [2025-03-08 00:27:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2025-03-08 00:27:48,042 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:27:48,042 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 48, 46, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-08 00:27:48,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 00:27:48,242 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 [2025-03-08 00:27:48,243 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:27:48,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:27:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1142218416, now seen corresponding path program 5 times [2025-03-08 00:27:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:27:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184186596] [2025-03-08 00:27:48,243 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:27:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:27:48,281 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 325 statements into 95 equivalence classes. [2025-03-08 00:27:54,909 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) and asserted 325 of 325 statements. [2025-03-08 00:27:54,909 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2025-03-08 00:27:54,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:27:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 6667 proven. 3480 refuted. 0 times theorem prover too weak. 3193 trivial. 0 not checked. [2025-03-08 00:27:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:27:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184186596] [2025-03-08 00:27:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184186596] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:27:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512410838] [2025-03-08 00:27:58,252 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:27:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:27:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:27:58,254 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) [2025-03-08 00:27:58,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:27:58,368 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 325 statements into 95 equivalence classes.