./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:32:29,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:32:29,950 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:32:29,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:32:29,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:32:29,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:32:29,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:32:29,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:32:29,968 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:32:29,968 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:32:29,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:32:29,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:32:29,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:32:29,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:32:29,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:32:29,970 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:32:29,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:29,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:32:29,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:32:29,971 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 -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2025-03-03 14:32:30,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:32:30,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:32:30,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:32:30,267 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:32:30,267 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:32:30,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2025-03-03 14:32:31,369 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648dcbf1b/67014c8235f044c7b5f242d22df11ff9/FLAGd6a4c91a2 [2025-03-03 14:32:31,554 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:32:31,555 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2025-03-03 14:32:31,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648dcbf1b/67014c8235f044c7b5f242d22df11ff9/FLAGd6a4c91a2 [2025-03-03 14:32:31,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648dcbf1b/67014c8235f044c7b5f242d22df11ff9 [2025-03-03 14:32:31,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:32:31,928 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:32:31,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:31,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:32:31,932 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:32:31,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:31" (1/1) ... [2025-03-03 14:32:31,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ce8587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:31, skipping insertion in model container [2025-03-03 14:32:31,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:31" (1/1) ... [2025-03-03 14:32:31,943 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:32:32,061 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/recursive/MultCommutative-2.c[970,983] [2025-03-03 14:32:32,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:32,073 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:32:32,083 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/recursive/MultCommutative-2.c[970,983] [2025-03-03 14:32:32,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:32,097 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:32:32,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32 WrapperNode [2025-03-03 14:32:32,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:32,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:32,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:32:32,099 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:32:32,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,123 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-03-03 14:32:32,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:32,124 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:32:32,124 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:32:32,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:32:32,131 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,148 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:32:32,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,150 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,155 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:32:32,156 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:32:32,157 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:32:32,157 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:32:32,158 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (1/1) ... [2025-03-03 14:32:32,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:32,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 14:32:32,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 14:32:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:32:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2025-03-03 14:32:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2025-03-03 14:32:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:32:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:32:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:32:32,241 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:32:32,242 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:32:32,291 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret5; [2025-03-03 14:32:32,291 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L19: havoc #t~ret4; [2025-03-03 14:32:32,333 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2025-03-03 14:32:32,333 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:32:32,338 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:32:32,338 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:32:32,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:32 BoogieIcfgContainer [2025-03-03 14:32:32,339 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:32:32,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:32:32,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:32:32,343 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:32:32,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:32:31" (1/3) ... [2025-03-03 14:32:32,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fc18c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:32, skipping insertion in model container [2025-03-03 14:32:32,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:32" (2/3) ... [2025-03-03 14:32:32,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fc18c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:32, skipping insertion in model container [2025-03-03 14:32:32,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:32" (3/3) ... [2025-03-03 14:32:32,345 INFO L128 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2025-03-03 14:32:32,357 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:32:32,358 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG MultCommutative-2.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:32:32,398 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:32:32,406 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;@30c937e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:32:32,406 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:32:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 14:32:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 14:32:32,412 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:32,412 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:32,413 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:32,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1335180330, now seen corresponding path program 1 times [2025-03-03 14:32:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910834424] [2025-03-03 14:32:32,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:32,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 14:32:32,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 14:32:32,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:32,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:32:32,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:32,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910834424] [2025-03-03 14:32:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910834424] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:32,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:32,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-03 14:32:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697009491] [2025-03-03 14:32:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:32,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 14:32:32,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:32,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 14:32:32,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-03 14:32:32,681 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:32:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:32,758 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2025-03-03 14:32:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 14:32:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2025-03-03 14:32:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:32,765 INFO L225 Difference]: With dead ends: 36 [2025-03-03 14:32:32,765 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 14:32:32,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:32:32,771 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:32,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 14:32:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-03 14:32:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-03 14:32:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-03-03 14:32:32,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2025-03-03 14:32:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:32,795 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-03-03 14:32:32,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:32:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-03-03 14:32:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-03 14:32:32,796 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:32,796 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:32,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:32:32,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:32,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash 241588428, now seen corresponding path program 1 times [2025-03-03 14:32:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370141594] [2025-03-03 14:32:32,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:32,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-03 14:32:32,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-03 14:32:32,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:32,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 14:32:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370141594] [2025-03-03 14:32:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370141594] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:32,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-03 14:32:32,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24982715] [2025-03-03 14:32:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:32,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 14:32:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:32,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 14:32:32,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-03 14:32:32,938 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:32:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:32,979 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2025-03-03 14:32:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:32:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-03-03 14:32:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:32,980 INFO L225 Difference]: With dead ends: 35 [2025-03-03 14:32:32,980 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:32:32,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:32:32,981 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:32,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:32:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2025-03-03 14:32:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-03 14:32:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-03-03 14:32:32,987 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2025-03-03 14:32:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:32,987 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-03-03 14:32:32,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:32:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-03-03 14:32:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-03 14:32:32,988 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:32,988 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:32,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:32:32,988 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:32,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1384005172, now seen corresponding path program 1 times [2025-03-03 14:32:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:32,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369215162] [2025-03-03 14:32:32,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:32,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-03 14:32:32,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 14:32:32,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:33,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 14:32:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:33,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369215162] [2025-03-03 14:32:33,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369215162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:33,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089797974] [2025-03-03 14:32:33,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:33,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:33,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:33,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:32:33,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-03 14:32:33,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 14:32:33,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:33,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:33,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 14:32:33,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 14:32:33,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 14:32:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089797974] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:33,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:33,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-03-03 14:32:33,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772501537] [2025-03-03 14:32:33,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:33,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 14:32:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:33,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 14:32:33,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 14:32:33,219 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:32:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:33,291 INFO L93 Difference]: Finished difference Result 35 states and 53 transitions. [2025-03-03 14:32:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:32:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-03-03 14:32:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:33,292 INFO L225 Difference]: With dead ends: 35 [2025-03-03 14:32:33,292 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 14:32:33,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-03 14:32:33,292 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:33,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 14:32:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2025-03-03 14:32:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-03 14:32:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2025-03-03 14:32:33,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 27 [2025-03-03 14:32:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:33,297 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2025-03-03 14:32:33,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:32:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2025-03-03 14:32:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-03 14:32:33,298 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:33,298 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:33,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:33,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:33,498 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:33,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -741173588, now seen corresponding path program 2 times [2025-03-03 14:32:33,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:33,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320229618] [2025-03-03 14:32:33,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:33,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:33,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-03 14:32:33,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 14:32:33,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:33,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 14:32:33,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:33,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320229618] [2025-03-03 14:32:33,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320229618] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:33,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:33,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:32:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580860978] [2025-03-03 14:32:33,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:33,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:32:33,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:33,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:32:33,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:33,565 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 14:32:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:33,616 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2025-03-03 14:32:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:32:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2025-03-03 14:32:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:33,617 INFO L225 Difference]: With dead ends: 29 [2025-03-03 14:32:33,618 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 14:32:33,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:33,619 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:33,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 14:32:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 14:32:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 14:32:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2025-03-03 14:32:33,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2025-03-03 14:32:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:33,628 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2025-03-03 14:32:33,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 14:32:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2025-03-03 14:32:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 14:32:33,629 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:33,629 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:33,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-03 14:32:33,629 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:33,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -950755594, now seen corresponding path program 1 times [2025-03-03 14:32:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482427878] [2025-03-03 14:32:33,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:33,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-03 14:32:33,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 14:32:33,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:33,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-03 14:32:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482427878] [2025-03-03 14:32:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482427878] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781828668] [2025-03-03 14:32:33,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:33,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:33,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:33,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:32:33,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-03 14:32:33,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 14:32:33,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:33,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:33,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 14:32:33,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-03 14:32:33,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-03 14:32:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781828668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:33,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:33,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2025-03-03 14:32:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457249247] [2025-03-03 14:32:33,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:33,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:32:33,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:33,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:32:33,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:32:33,899 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 14:32:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:34,021 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2025-03-03 14:32:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:32:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2025-03-03 14:32:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:34,022 INFO L225 Difference]: With dead ends: 47 [2025-03-03 14:32:34,022 INFO L226 Difference]: Without dead ends: 39 [2025-03-03 14:32:34,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:32:34,023 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:34,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-03 14:32:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2025-03-03 14:32:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 24 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 14:32:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2025-03-03 14:32:34,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 46 [2025-03-03 14:32:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:34,029 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2025-03-03 14:32:34,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 14:32:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2025-03-03 14:32:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 14:32:34,030 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:34,030 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:34,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:32:34,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:34,231 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:34,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -985320906, now seen corresponding path program 3 times [2025-03-03 14:32:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651600683] [2025-03-03 14:32:34,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:34,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 4 equivalence classes. [2025-03-03 14:32:34,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 14:32:34,244 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 14:32:34,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:32:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:34,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651600683] [2025-03-03 14:32:34,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651600683] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:34,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820403588] [2025-03-03 14:32:34,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:34,561 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:34,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:32:34,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 4 equivalence classes. [2025-03-03 14:32:34,603 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 14:32:34,603 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 14:32:34,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:34,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 14:32:34,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:32:34,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:32:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820403588] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:35,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:35,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 35 [2025-03-03 14:32:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980199910] [2025-03-03 14:32:35,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:35,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 14:32:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:35,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 14:32:35,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:32:35,474 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-03 14:32:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:35,896 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2025-03-03 14:32:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:32:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2025-03-03 14:32:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:35,898 INFO L225 Difference]: With dead ends: 47 [2025-03-03 14:32:35,898 INFO L226 Difference]: Without dead ends: 43 [2025-03-03 14:32:35,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 14:32:35,899 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:35,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:32:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-03 14:32:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2025-03-03 14:32:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 5 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 14:32:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2025-03-03 14:32:35,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 34 [2025-03-03 14:32:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:35,906 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2025-03-03 14:32:35,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-03 14:32:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2025-03-03 14:32:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 14:32:35,907 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:35,907 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:35,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:36,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:36,111 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:36,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1494101284, now seen corresponding path program 4 times [2025-03-03 14:32:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611284859] [2025-03-03 14:32:36,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:36,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:36,117 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 14:32:36,126 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 14:32:36,128 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:36,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:32:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611284859] [2025-03-03 14:32:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611284859] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849956992] [2025-03-03 14:32:36,545 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:36,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:36,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:36,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:32:36,568 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-03 14:32:36,581 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 14:32:36,582 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:36,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:36,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-03 14:32:36,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-03 14:32:36,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:32:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849956992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:37,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 18] total 38 [2025-03-03 14:32:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313220332] [2025-03-03 14:32:37,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:37,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 14:32:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:37,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 14:32:37,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:32:37,274 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-03 14:32:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:38,026 INFO L93 Difference]: Finished difference Result 77 states and 126 transitions. [2025-03-03 14:32:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 14:32:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 41 [2025-03-03 14:32:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:38,028 INFO L225 Difference]: With dead ends: 77 [2025-03-03 14:32:38,028 INFO L226 Difference]: Without dead ends: 60 [2025-03-03 14:32:38,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=411, Invalid=2895, Unknown=0, NotChecked=0, Total=3306 [2025-03-03 14:32:38,030 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:38,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:32:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-03 14:32:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2025-03-03 14:32:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2025-03-03 14:32:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 77 transitions. [2025-03-03 14:32:38,047 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 77 transitions. Word has length 41 [2025-03-03 14:32:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:38,047 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 77 transitions. [2025-03-03 14:32:38,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-03 14:32:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 77 transitions. [2025-03-03 14:32:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-03 14:32:38,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:38,049 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:38,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:38,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:38,250 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:38,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2063596178, now seen corresponding path program 2 times [2025-03-03 14:32:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:38,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623210225] [2025-03-03 14:32:38,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:38,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-03 14:32:38,264 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 14:32:38,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:38,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 14:32:38,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623210225] [2025-03-03 14:32:38,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623210225] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429133938] [2025-03-03 14:32:38,318 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:38,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:38,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:38,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:32:38,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-03 14:32:38,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 14:32:38,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:38,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:38,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:32:38,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-03-03 14:32:38,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-03 14:32:38,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429133938] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:38,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:38,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2025-03-03 14:32:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928192712] [2025-03-03 14:32:38,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:38,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:32:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:38,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:32:38,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:32:38,525 INFO L87 Difference]: Start difference. First operand 50 states and 77 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-03 14:32:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:38,600 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2025-03-03 14:32:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:32:38,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2025-03-03 14:32:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:38,601 INFO L225 Difference]: With dead ends: 79 [2025-03-03 14:32:38,601 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 14:32:38,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2025-03-03 14:32:38,602 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:38,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 14:32:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-03 14:32:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-03 14:32:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2025-03-03 14:32:38,608 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 61 [2025-03-03 14:32:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:38,609 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2025-03-03 14:32:38,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-03 14:32:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2025-03-03 14:32:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 14:32:38,612 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:38,612 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:38,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:38,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:38,813 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:38,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1655028292, now seen corresponding path program 5 times [2025-03-03 14:32:38,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:38,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334495476] [2025-03-03 14:32:38,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:38,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:38,819 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 5 equivalence classes. [2025-03-03 14:32:38,828 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 14:32:38,830 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 14:32:38,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 14:32:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:39,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334495476] [2025-03-03 14:32:39,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334495476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:39,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085570667] [2025-03-03 14:32:39,162 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:39,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:39,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:32:39,187 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 5 equivalence classes. [2025-03-03 14:32:39,199 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 14:32:39,199 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-03 14:32:39,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:39,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-03 14:32:39,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 14:32:39,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-03 14:32:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085570667] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:39,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:39,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 15] total 39 [2025-03-03 14:32:39,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134839326] [2025-03-03 14:32:39,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:39,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-03 14:32:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:39,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-03 14:32:39,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:32:39,877 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 39 states, 35 states have (on average 1.542857142857143) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-03 14:32:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:40,417 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2025-03-03 14:32:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 14:32:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.542857142857143) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) Word has length 41 [2025-03-03 14:32:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:40,418 INFO L225 Difference]: With dead ends: 43 [2025-03-03 14:32:40,418 INFO L226 Difference]: Without dead ends: 35 [2025-03-03 14:32:40,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 14:32:40,419 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:40,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 191 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:32:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-03 14:32:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2025-03-03 14:32:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-03 14:32:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2025-03-03 14:32:40,422 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 41 [2025-03-03 14:32:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:40,422 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2025-03-03 14:32:40,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.542857142857143) internal successors, (54), 27 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-03 14:32:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2025-03-03 14:32:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 14:32:40,423 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:40,423 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:40,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 14:32:40,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:40,624 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:40,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:40,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1467085126, now seen corresponding path program 6 times [2025-03-03 14:32:40,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:40,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856801716] [2025-03-03 14:32:40,624 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:32:40,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:40,628 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 62 statements into 9 equivalence classes. [2025-03-03 14:32:40,648 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 14:32:40,649 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:32:40,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 14:32:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856801716] [2025-03-03 14:32:41,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856801716] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040128517] [2025-03-03 14:32:41,332 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:32:41,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:41,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:41,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:41,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:32:41,356 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 62 statements into 9 equivalence classes. [2025-03-03 14:32:41,373 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 14:32:41,373 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:32:41,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:41,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-03 14:32:41,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-03 14:32:41,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-03 14:32:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040128517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:42,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 21] total 47 [2025-03-03 14:32:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742344357] [2025-03-03 14:32:42,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:42,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-03 14:32:42,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:42,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-03 14:32:42,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1993, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 14:32:42,376 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 47 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 33 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-03 14:32:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:42,860 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2025-03-03 14:32:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 14:32:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 33 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) Word has length 62 [2025-03-03 14:32:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:42,861 INFO L225 Difference]: With dead ends: 45 [2025-03-03 14:32:42,861 INFO L226 Difference]: Without dead ends: 35 [2025-03-03 14:32:42,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=3497, Unknown=0, NotChecked=0, Total=3906 [2025-03-03 14:32:42,863 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:42,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 258 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:32:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-03 14:32:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-03 14:32:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-03 14:32:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-03 14:32:42,866 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 62 [2025-03-03 14:32:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:42,866 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-03 14:32:42,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 33 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2025-03-03 14:32:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-03 14:32:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 14:32:42,867 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:42,867 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:42,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 14:32:43,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:43,068 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:43,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 196932686, now seen corresponding path program 7 times [2025-03-03 14:32:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:43,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755839532] [2025-03-03 14:32:43,068 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:32:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:43,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 14:32:43,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 14:32:43,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:43,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 137 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 14:32:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755839532] [2025-03-03 14:32:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755839532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645768954] [2025-03-03 14:32:43,647 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:32:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:43,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:43,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:32:43,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 14:32:43,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 14:32:43,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:43,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:43,690 WARN L254 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-03 14:32:43,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2025-03-03 14:32:44,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 14:32:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645768954] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:45,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:45,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 27] total 64 [2025-03-03 14:32:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871377264] [2025-03-03 14:32:45,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:45,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-03 14:32:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:45,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-03 14:32:45,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3808, Unknown=0, NotChecked=0, Total=4032 [2025-03-03 14:32:45,237 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 64 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (22), 21 states have call predecessors, (22), 17 states have call successors, (22) [2025-03-03 14:32:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:46,130 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2025-03-03 14:32:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 14:32:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (22), 21 states have call predecessors, (22), 17 states have call successors, (22) Word has length 62 [2025-03-03 14:32:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:46,131 INFO L225 Difference]: With dead ends: 48 [2025-03-03 14:32:46,131 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 14:32:46,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=677, Invalid=6633, Unknown=0, NotChecked=0, Total=7310 [2025-03-03 14:32:46,133 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:46,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 475 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 14:32:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 14:32:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2025-03-03 14:32:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (13), 8 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 14:32:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-03 14:32:46,137 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 62 [2025-03-03 14:32:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:46,138 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-03 14:32:46,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 43 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (22), 21 states have call predecessors, (22), 17 states have call successors, (22) [2025-03-03 14:32:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-03 14:32:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 14:32:46,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:46,138 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:46,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:46,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-03 14:32:46,339 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:46,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1657736378, now seen corresponding path program 8 times [2025-03-03 14:32:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391015689] [2025-03-03 14:32:46,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:46,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-03-03 14:32:46,350 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 14:32:46,350 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:46,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 156 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-03 14:32:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391015689] [2025-03-03 14:32:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391015689] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283883601] [2025-03-03 14:32:46,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:46,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:46,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:32:46,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-03-03 14:32:46,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 14:32:46,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:46,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:46,981 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-03-03 14:32:46,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-03-03 14:32:47,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-03 14:32:48,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283883601] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:48,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:48,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 55 [2025-03-03 14:32:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287099099] [2025-03-03 14:32:48,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:48,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 14:32:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:48,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 14:32:48,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 14:32:48,401 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2025-03-03 14:32:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:49,230 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2025-03-03 14:32:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-03 14:32:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) Word has length 76 [2025-03-03 14:32:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:49,231 INFO L225 Difference]: With dead ends: 59 [2025-03-03 14:32:49,231 INFO L226 Difference]: Without dead ends: 49 [2025-03-03 14:32:49,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=761, Invalid=6211, Unknown=0, NotChecked=0, Total=6972 [2025-03-03 14:32:49,232 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:49,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 344 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:32:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-03 14:32:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2025-03-03 14:32:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (18), 10 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-03 14:32:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2025-03-03 14:32:49,238 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 76 [2025-03-03 14:32:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:49,239 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2025-03-03 14:32:49,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2025-03-03 14:32:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2025-03-03 14:32:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 14:32:49,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:49,240 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:49,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 14:32:49,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:49,440 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:49,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash 988511436, now seen corresponding path program 9 times [2025-03-03 14:32:49,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:49,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416381392] [2025-03-03 14:32:49,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:49,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:49,445 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 83 statements into 13 equivalence classes. [2025-03-03 14:32:49,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 14:32:49,461 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 14:32:49,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 20 proven. 176 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-03 14:32:50,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:50,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416381392] [2025-03-03 14:32:50,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416381392] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987124149] [2025-03-03 14:32:50,078 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:50,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:50,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:32:50,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 83 statements into 13 equivalence classes. [2025-03-03 14:32:50,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 14:32:50,136 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-03 14:32:50,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:50,138 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-03-03 14:32:50,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-03-03 14:32:50,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 250 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-03 14:32:51,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987124149] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:51,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:51,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 36] total 55 [2025-03-03 14:32:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147316532] [2025-03-03 14:32:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:51,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 14:32:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:51,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 14:32:51,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 14:32:51,850 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 55 states, 51 states have (on average 1.607843137254902) internal successors, (82), 36 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (25), 19 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-03 14:32:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:52,713 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2025-03-03 14:32:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 14:32:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.607843137254902) internal successors, (82), 36 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (25), 19 states have call predecessors, (25), 15 states have call successors, (25) Word has length 83 [2025-03-03 14:32:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:52,714 INFO L225 Difference]: With dead ends: 65 [2025-03-03 14:32:52,714 INFO L226 Difference]: Without dead ends: 53 [2025-03-03 14:32:52,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=783, Invalid=5859, Unknown=0, NotChecked=0, Total=6642 [2025-03-03 14:32:52,716 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:52,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 362 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:32:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-03 14:32:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2025-03-03 14:32:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (17), 10 states have call predecessors, (17), 5 states have call successors, (17) [2025-03-03 14:32:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-03-03 14:32:52,723 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 83 [2025-03-03 14:32:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:52,724 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-03-03 14:32:52,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.607843137254902) internal successors, (82), 36 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (25), 19 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-03 14:32:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-03-03 14:32:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 14:32:52,725 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:52,725 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:52,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 14:32:52,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:32:52,926 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:52,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash 619291484, now seen corresponding path program 10 times [2025-03-03 14:32:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:52,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159988] [2025-03-03 14:32:52,926 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:52,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:52,931 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 83 statements into 2 equivalence classes. [2025-03-03 14:32:52,940 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 14:32:52,940 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:52,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 48 proven. 194 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-03 14:32:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159988] [2025-03-03 14:32:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159988] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581931210] [2025-03-03 14:32:53,708 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:53,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:53,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:53,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:53,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:32:53,744 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 83 statements into 2 equivalence classes. [2025-03-03 14:32:53,763 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 14:32:53,763 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:53,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:53,765 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-03-03 14:32:53,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2025-03-03 14:32:54,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-03 14:32:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581931210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:55,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:55,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 36] total 74 [2025-03-03 14:32:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527207327] [2025-03-03 14:32:55,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:55,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-03 14:32:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:55,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-03 14:32:55,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5125, Unknown=0, NotChecked=0, Total=5402 [2025-03-03 14:32:55,865 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-03 14:32:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:57,105 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2025-03-03 14:32:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 14:32:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2025-03-03 14:32:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:57,106 INFO L225 Difference]: With dead ends: 63 [2025-03-03 14:32:57,106 INFO L226 Difference]: Without dead ends: 56 [2025-03-03 14:32:57,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2025-03-03 14:32:57,108 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:57,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 575 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 14:32:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-03 14:32:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2025-03-03 14:32:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (19), 11 states have call predecessors, (19), 5 states have call successors, (19) [2025-03-03 14:32:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2025-03-03 14:32:57,114 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 83 [2025-03-03 14:32:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:57,114 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2025-03-03 14:32:57,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-03 14:32:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2025-03-03 14:32:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-03 14:32:57,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:57,115 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:57,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:32:57,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:32:57,315 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:57,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1948672892, now seen corresponding path program 11 times [2025-03-03 14:32:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879516539] [2025-03-03 14:32:57,316 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:57,319 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 111 statements into 18 equivalence classes. [2025-03-03 14:32:57,333 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 14:32:57,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-03 14:32:57,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 109 proven. 383 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-03 14:32:58,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879516539] [2025-03-03 14:32:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879516539] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926169473] [2025-03-03 14:32:58,664 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:58,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:58,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:58,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:58,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:32:58,700 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 111 statements into 18 equivalence classes. [2025-03-03 14:32:58,725 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 14:32:58,725 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-03 14:32:58,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,727 WARN L254 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 181 conjuncts are in the unsatisfiable core [2025-03-03 14:32:58,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2025-03-03 14:32:59,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 53 proven. 519 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-03-03 14:33:02,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926169473] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:02,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:02,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 26, 48] total 103 [2025-03-03 14:33:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434616884] [2025-03-03 14:33:02,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:02,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-03-03 14:33:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:02,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-03-03 14:33:02,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=10085, Unknown=0, NotChecked=0, Total=10506 [2025-03-03 14:33:02,661 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 103 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 64 states have internal predecessors, (143), 23 states have call successors, (23), 1 states have call predecessors, (23), 29 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-03-03 14:33:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:04,763 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2025-03-03 14:33:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-03 14:33:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 64 states have internal predecessors, (143), 23 states have call successors, (23), 1 states have call predecessors, (23), 29 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) Word has length 111 [2025-03-03 14:33:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:04,764 INFO L225 Difference]: With dead ends: 73 [2025-03-03 14:33:04,764 INFO L226 Difference]: Without dead ends: 59 [2025-03-03 14:33:04,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1498, Invalid=17684, Unknown=0, NotChecked=0, Total=19182 [2025-03-03 14:33:04,766 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 137 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 3842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:04,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1012 Invalid, 3842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 14:33:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-03 14:33:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2025-03-03 14:33:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 10 states have return successors, (21), 12 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 14:33:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2025-03-03 14:33:04,773 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 111 [2025-03-03 14:33:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:04,773 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2025-03-03 14:33:04,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 64 states have internal predecessors, (143), 23 states have call successors, (23), 1 states have call predecessors, (23), 29 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-03-03 14:33:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2025-03-03 14:33:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 14:33:04,773 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:04,774 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:04,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:04,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:33:04,974 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:04,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1898741348, now seen corresponding path program 12 times [2025-03-03 14:33:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:04,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225140817] [2025-03-03 14:33:04,975 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:04,978 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 97 statements into 14 equivalence classes. [2025-03-03 14:33:04,988 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 14:33:04,988 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-03-03 14:33:04,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 65 proven. 335 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-03 14:33:05,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:05,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225140817] [2025-03-03 14:33:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225140817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:05,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174144032] [2025-03-03 14:33:05,865 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:05,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:05,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:05,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:33:05,911 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 97 statements into 14 equivalence classes. [2025-03-03 14:33:05,933 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 14:33:05,934 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-03-03 14:33:05,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:05,936 WARN L254 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 157 conjuncts are in the unsatisfiable core [2025-03-03 14:33:05,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-03 14:33:06,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-03 14:33:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174144032] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:08,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 27, 41] total 86 [2025-03-03 14:33:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101021170] [2025-03-03 14:33:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:08,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2025-03-03 14:33:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:08,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2025-03-03 14:33:08,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=7006, Unknown=0, NotChecked=0, Total=7310 [2025-03-03 14:33:08,772 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 86 states, 82 states have (on average 1.5609756097560976) internal successors, (128), 52 states have internal predecessors, (128), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (37), 34 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-03 14:33:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:10,239 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2025-03-03 14:33:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-03 14:33:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 82 states have (on average 1.5609756097560976) internal successors, (128), 52 states have internal predecessors, (128), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (37), 34 states have call predecessors, (37), 23 states have call successors, (37) Word has length 97 [2025-03-03 14:33:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:10,240 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:33:10,240 INFO L226 Difference]: Without dead ends: 62 [2025-03-03 14:33:10,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1054, Invalid=12752, Unknown=0, NotChecked=0, Total=13806 [2025-03-03 14:33:10,241 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:10,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 792 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 14:33:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-03 14:33:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2025-03-03 14:33:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (23), 13 states have call predecessors, (23), 5 states have call successors, (23) [2025-03-03 14:33:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2025-03-03 14:33:10,252 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 97 [2025-03-03 14:33:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:10,252 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2025-03-03 14:33:10,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 82 states have (on average 1.5609756097560976) internal successors, (128), 52 states have internal predecessors, (128), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (37), 34 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-03 14:33:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2025-03-03 14:33:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-03 14:33:10,253 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:10,253 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:10,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 14:33:10,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-03 14:33:10,453 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:10,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 411000118, now seen corresponding path program 13 times [2025-03-03 14:33:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:10,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163785929] [2025-03-03 14:33:10,454 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:10,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 104 statements into 1 equivalence classes. [2025-03-03 14:33:10,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 104 of 104 statements. [2025-03-03 14:33:10,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:10,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-03 14:33:11,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163785929] [2025-03-03 14:33:11,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163785929] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174092705] [2025-03-03 14:33:11,580 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:11,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:11,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:33:11,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 104 statements into 1 equivalence classes. [2025-03-03 14:33:11,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 104 of 104 statements. [2025-03-03 14:33:11,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:11,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:11,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 169 conjuncts are in the unsatisfiable core [2025-03-03 14:33:11,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-03-03 14:33:12,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-03 14:33:15,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174092705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:15,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:15,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30, 45] total 106 [2025-03-03 14:33:15,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711022649] [2025-03-03 14:33:15,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:15,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2025-03-03 14:33:15,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:15,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2025-03-03 14:33:15,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10767, Unknown=0, NotChecked=0, Total=11130 [2025-03-03 14:33:15,576 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2025-03-03 14:33:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:17,428 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2025-03-03 14:33:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-03 14:33:17,428 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) Word has length 104 [2025-03-03 14:33:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:17,429 INFO L225 Difference]: With dead ends: 72 [2025-03-03 14:33:17,429 INFO L226 Difference]: Without dead ends: 65 [2025-03-03 14:33:17,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1374, Invalid=18086, Unknown=0, NotChecked=0, Total=19460 [2025-03-03 14:33:17,431 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:17,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 988 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 14:33:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-03 14:33:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2025-03-03 14:33:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (25), 14 states have call predecessors, (25), 5 states have call successors, (25) [2025-03-03 14:33:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2025-03-03 14:33:17,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 104 [2025-03-03 14:33:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:17,438 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2025-03-03 14:33:17,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2025-03-03 14:33:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2025-03-03 14:33:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-03-03 14:33:17,439 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:17,439 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:17,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:33:17,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:17,650 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:17,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1931280804, now seen corresponding path program 14 times [2025-03-03 14:33:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:17,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811888453] [2025-03-03 14:33:17,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:17,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 139 statements into 2 equivalence classes. [2025-03-03 14:33:17,665 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 139 of 139 statements. [2025-03-03 14:33:17,665 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:17,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 954 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2025-03-03 14:33:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811888453] [2025-03-03 14:33:19,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811888453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147568624] [2025-03-03 14:33:19,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:19,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:19,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:19,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:33:19,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 139 statements into 2 equivalence classes. [2025-03-03 14:33:19,762 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 139 of 139 statements. [2025-03-03 14:33:19,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:19,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:19,765 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 229 conjuncts are in the unsatisfiable core [2025-03-03 14:33:19,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 11 proven. 515 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2025-03-03 14:33:21,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 68 proven. 884 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-03-03 14:33:26,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147568624] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:26,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:26,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 32, 60] total 137 [2025-03-03 14:33:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361129710] [2025-03-03 14:33:26,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:26,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2025-03-03 14:33:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:26,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2025-03-03 14:33:26,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=18141, Unknown=0, NotChecked=0, Total=18632 [2025-03-03 14:33:26,136 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2025-03-03 14:33:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:29,389 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2025-03-03 14:33:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-03 14:33:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) Word has length 139 [2025-03-03 14:33:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:29,391 INFO L225 Difference]: With dead ends: 85 [2025-03-03 14:33:29,391 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:33:29,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2445, Invalid=30861, Unknown=0, NotChecked=0, Total=33306 [2025-03-03 14:33:29,393 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 234 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 5069 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 5668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 5069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:29,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1258 Invalid, 5668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 5069 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-03 14:33:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:33:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2025-03-03 14:33:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (27), 15 states have call predecessors, (27), 5 states have call successors, (27) [2025-03-03 14:33:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2025-03-03 14:33:29,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 139 [2025-03-03 14:33:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:29,399 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2025-03-03 14:33:29,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2025-03-03 14:33:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2025-03-03 14:33:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-03 14:33:29,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:29,400 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:29,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 14:33:29,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:33:29,601 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:29,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash -637876178, now seen corresponding path program 15 times [2025-03-03 14:33:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076993385] [2025-03-03 14:33:29,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:29,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 118 statements into 16 equivalence classes. [2025-03-03 14:33:29,618 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 118 of 118 statements. [2025-03-03 14:33:29,618 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-03 14:33:29,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 138 proven. 440 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 14:33:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076993385] [2025-03-03 14:33:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076993385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408012120] [2025-03-03 14:33:30,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:30,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:30,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:33:30,898 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 118 statements into 16 equivalence classes. [2025-03-03 14:33:30,927 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 118 of 118 statements. [2025-03-03 14:33:30,927 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-03 14:33:30,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:30,930 WARN L254 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 193 conjuncts are in the unsatisfiable core [2025-03-03 14:33:30,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2025-03-03 14:33:32,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-03-03 14:33:35,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408012120] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:35,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 34, 51] total 109 [2025-03-03 14:33:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418523856] [2025-03-03 14:33:35,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:35,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2025-03-03 14:33:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:35,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2025-03-03 14:33:35,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=11397, Unknown=0, NotChecked=0, Total=11772 [2025-03-03 14:33:35,395 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 109 states, 105 states have (on average 1.4857142857142858) internal successors, (156), 65 states have internal predecessors, (156), 25 states have call successors, (25), 1 states have call predecessors, (25), 30 states have return successors, (45), 44 states have call predecessors, (45), 25 states have call successors, (45) [2025-03-03 14:33:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:37,553 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2025-03-03 14:33:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-03 14:33:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 105 states have (on average 1.4857142857142858) internal successors, (156), 65 states have internal predecessors, (156), 25 states have call successors, (25), 1 states have call predecessors, (25), 30 states have return successors, (45), 44 states have call predecessors, (45), 25 states have call successors, (45) Word has length 118 [2025-03-03 14:33:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:37,554 INFO L225 Difference]: With dead ends: 78 [2025-03-03 14:33:37,554 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 14:33:37,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1423, Invalid=20039, Unknown=0, NotChecked=0, Total=21462 [2025-03-03 14:33:37,556 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 192 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:37,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1234 Invalid, 3864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 14:33:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 14:33:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2025-03-03 14:33:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 14 states have return successors, (29), 16 states have call predecessors, (29), 5 states have call successors, (29) [2025-03-03 14:33:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-03-03 14:33:37,564 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 118 [2025-03-03 14:33:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:37,564 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-03-03 14:33:37,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 105 states have (on average 1.4857142857142858) internal successors, (156), 65 states have internal predecessors, (156), 25 states have call successors, (25), 1 states have call predecessors, (25), 30 states have return successors, (45), 44 states have call predecessors, (45), 25 states have call successors, (45) [2025-03-03 14:33:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-03-03 14:33:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2025-03-03 14:33:37,565 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:37,565 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:37,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 14:33:37,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:37,766 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:37,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash -951600130, now seen corresponding path program 16 times [2025-03-03 14:33:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643342457] [2025-03-03 14:33:37,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:37,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-03-03 14:33:37,778 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 160 of 160 statements. [2025-03-03 14:33:37,778 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:33:37,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 64 proven. 776 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2025-03-03 14:33:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643342457] [2025-03-03 14:33:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643342457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127509666] [2025-03-03 14:33:39,782 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:39,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:39,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:33:39,851 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-03-03 14:33:39,879 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 160 of 160 statements. [2025-03-03 14:33:39,879 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:33:39,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:39,882 WARN L254 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 265 conjuncts are in the unsatisfiable core [2025-03-03 14:33:39,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 13 proven. 696 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2025-03-03 14:33:41,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 80 proven. 1220 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 14:33:47,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127509666] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:47,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 36, 69] total 137 [2025-03-03 14:33:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549708000] [2025-03-03 14:33:47,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:47,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2025-03-03 14:33:47,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:47,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2025-03-03 14:33:47,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=18082, Unknown=0, NotChecked=0, Total=18632 [2025-03-03 14:33:47,134 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 137 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 79 states have internal predecessors, (184), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (59), 58 states have call predecessors, (59), 26 states have call successors, (59) [2025-03-03 14:33:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:50,790 INFO L93 Difference]: Finished difference Result 93 states and 130 transitions. [2025-03-03 14:33:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-03 14:33:50,790 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 79 states have internal predecessors, (184), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (59), 58 states have call predecessors, (59), 26 states have call successors, (59) Word has length 160 [2025-03-03 14:33:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:50,791 INFO L225 Difference]: With dead ends: 93 [2025-03-03 14:33:50,791 INFO L226 Difference]: Without dead ends: 74 [2025-03-03 14:33:50,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7336 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2279, Invalid=32877, Unknown=0, NotChecked=0, Total=35156 [2025-03-03 14:33:50,793 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 266 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 5447 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 5700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 5447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:50,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1198 Invalid, 5700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 5447 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-03 14:33:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-03 14:33:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2025-03-03 14:33:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (31), 17 states have call predecessors, (31), 5 states have call successors, (31) [2025-03-03 14:33:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2025-03-03 14:33:50,802 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 160 [2025-03-03 14:33:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:50,802 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2025-03-03 14:33:50,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 79 states have internal predecessors, (184), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (59), 58 states have call predecessors, (59), 26 states have call successors, (59) [2025-03-03 14:33:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2025-03-03 14:33:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2025-03-03 14:33:50,803 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:50,803 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:50,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:33:51,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:51,007 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1044666150, now seen corresponding path program 17 times [2025-03-03 14:33:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886963077] [2025-03-03 14:33:51,008 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,012 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 132 statements into 18 equivalence classes. [2025-03-03 14:33:51,024 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 132 of 132 statements. [2025-03-03 14:33:51,024 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-03 14:33:51,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 41 proven. 496 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2025-03-03 14:33:52,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886963077] [2025-03-03 14:33:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886963077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839471637] [2025-03-03 14:33:52,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:52,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:52,262 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:52,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:33:52,342 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 132 statements into 18 equivalence classes. [2025-03-03 14:33:52,384 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 132 of 132 statements. [2025-03-03 14:33:52,384 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-03 14:33:52,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,387 WARN L254 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-03-03 14:33:52,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 29 proven. 454 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2025-03-03 14:33:53,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 54 proven. 795 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2025-03-03 14:33:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839471637] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:57,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 38, 57] total 116 [2025-03-03 14:33:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767627884] [2025-03-03 14:33:57,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:57,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2025-03-03 14:33:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:57,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2025-03-03 14:33:57,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=12900, Unknown=0, NotChecked=0, Total=13340 [2025-03-03 14:33:57,839 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 116 states, 112 states have (on average 1.4196428571428572) internal successors, (159), 66 states have internal predecessors, (159), 22 states have call successors, (22), 1 states have call predecessors, (22), 34 states have return successors, (51), 50 states have call predecessors, (51), 22 states have call successors, (51) [2025-03-03 14:34:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:00,579 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2025-03-03 14:34:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-03 14:34:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 112 states have (on average 1.4196428571428572) internal successors, (159), 66 states have internal predecessors, (159), 22 states have call successors, (22), 1 states have call predecessors, (22), 34 states have return successors, (51), 50 states have call predecessors, (51), 22 states have call successors, (51) Word has length 132 [2025-03-03 14:34:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:00,580 INFO L225 Difference]: With dead ends: 84 [2025-03-03 14:34:00,580 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 14:34:00,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5384 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1527, Invalid=22965, Unknown=0, NotChecked=0, Total=24492 [2025-03-03 14:34:00,582 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 304 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:00,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1507 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-03 14:34:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 14:34:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2025-03-03 14:34:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (33), 18 states have call predecessors, (33), 5 states have call successors, (33) [2025-03-03 14:34:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2025-03-03 14:34:00,595 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 132 [2025-03-03 14:34:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:00,595 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2025-03-03 14:34:00,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 112 states have (on average 1.4196428571428572) internal successors, (159), 66 states have internal predecessors, (159), 22 states have call successors, (22), 1 states have call predecessors, (22), 34 states have return successors, (51), 50 states have call predecessors, (51), 22 states have call successors, (51) [2025-03-03 14:34:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2025-03-03 14:34:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-03-03 14:34:00,596 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:00,596 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:00,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:34:00,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,797 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:00,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1964160892, now seen corresponding path program 18 times [2025-03-03 14:34:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:00,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13539797] [2025-03-03 14:34:00,797 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:00,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:00,802 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 139 statements into 19 equivalence classes. [2025-03-03 14:34:00,813 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 139 of 139 statements. [2025-03-03 14:34:00,813 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-03 14:34:00,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 50 proven. 666 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2025-03-03 14:34:02,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13539797] [2025-03-03 14:34:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13539797] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812527896] [2025-03-03 14:34:02,188 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:02,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:02,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 14:34:02,277 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 139 statements into 19 equivalence classes.