./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.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 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:51:22,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:51:23,045 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:51:23,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:51:23,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:51:23,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:51:23,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:51:23,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:51:23,073 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:51:23,073 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:51:23,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:51:23,074 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:51:23,074 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:51:23,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:51:23,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:51:23,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:51:23,076 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:51:23,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:51:23,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:51:23,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:51:23,077 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 -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2025-03-16 13:51:23,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:51:23,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:51:23,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:51:23,308 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:51:23,308 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:51:23,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2025-03-16 13:51:24,375 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4847dee3e/5bea955eb46c44329f20f98c817ad0b2/FLAG78a2ee2f6 [2025-03-16 13:51:24,569 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:51:24,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2025-03-16 13:51:24,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4847dee3e/5bea955eb46c44329f20f98c817ad0b2/FLAG78a2ee2f6 [2025-03-16 13:51:24,610 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4847dee3e/5bea955eb46c44329f20f98c817ad0b2 [2025-03-16 13:51:24,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:51:24,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:51:24,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:51:24,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:51:24,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:51:24,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6866a829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24, skipping insertion in model container [2025-03-16 13:51:24,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:51:24,743 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2025-03-16 13:51:24,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:51:24,763 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:51:24,771 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2025-03-16 13:51:24,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:51:24,785 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:51:24,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24 WrapperNode [2025-03-16 13:51:24,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:51:24,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:51:24,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:51:24,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:51:24,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,807 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2025-03-16 13:51:24,808 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:51:24,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:51:24,809 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:51:24,809 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:51:24,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,826 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:51:24,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,833 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:51:24,839 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:51:24,839 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:51:24,840 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:51:24,840 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (1/1) ... [2025-03-16 13:51:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:51:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:24,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:51:24,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:51:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:51:24,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:51:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:51:24,934 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:51:24,935 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:51:25,017 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:51:25,021 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-16 13:51:25,021 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:51:25,030 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:51:25,030 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:51:25,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:51:25 BoogieIcfgContainer [2025-03-16 13:51:25,031 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:51:25,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:51:25,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:51:25,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:51:25,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:51:24" (1/3) ... [2025-03-16 13:51:25,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab08529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:51:25, skipping insertion in model container [2025-03-16 13:51:25,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:51:24" (2/3) ... [2025-03-16 13:51:25,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab08529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:51:25, skipping insertion in model container [2025-03-16 13:51:25,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:51:25" (3/3) ... [2025-03-16 13:51:25,037 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2025-03-16 13:51:25,046 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:51:25,047 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_var_plus_ind2.c that has 1 procedures, 12 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 13:51:25,088 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:51:25,097 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;@194d6780, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:51:25,098 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:51:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 13:51:25,105 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:25,105 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 13:51:25,106 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:25,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1389282366, now seen corresponding path program 1 times [2025-03-16 13:51:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435907781] [2025-03-16 13:51:25,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:25,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:25,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 13:51:25,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 13:51:25,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:25,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435907781] [2025-03-16 13:51:25,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435907781] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:51:25,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:51:25,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:51:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289859249] [2025-03-16 13:51:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:51:25,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:51:25,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:25,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:51:25,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:51:25,309 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:25,330 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2025-03-16 13:51:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:51:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-16 13:51:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:25,336 INFO L225 Difference]: With dead ends: 29 [2025-03-16 13:51:25,336 INFO L226 Difference]: Without dead ends: 17 [2025-03-16 13:51:25,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:51:25,345 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:25,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:51:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-16 13:51:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2025-03-16 13:51:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-03-16 13:51:25,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2025-03-16 13:51:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:25,370 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-03-16 13:51:25,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-03-16 13:51:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 13:51:25,371 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:25,371 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:25,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:51:25,371 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:25,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 91330027, now seen corresponding path program 1 times [2025-03-16 13:51:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336640898] [2025-03-16 13:51:25,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:25,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:51:25,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:51:25,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:25,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:25,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336640898] [2025-03-16 13:51:25,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336640898] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:51:25,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:51:25,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:51:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410943642] [2025-03-16 13:51:25,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:51:25,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:51:25,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:25,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:51:25,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:51:25,480 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:25,495 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2025-03-16 13:51:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:51:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 13:51:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:25,496 INFO L225 Difference]: With dead ends: 18 [2025-03-16 13:51:25,496 INFO L226 Difference]: Without dead ends: 11 [2025-03-16 13:51:25,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:51:25,496 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:25,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:51:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-03-16 13:51:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-03-16 13:51:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-03-16 13:51:25,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2025-03-16 13:51:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:25,499 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-03-16 13:51:25,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-03-16 13:51:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:51:25,499 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:25,499 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:25,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:51:25,499 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:25,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1400905281, now seen corresponding path program 1 times [2025-03-16 13:51:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:25,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740498956] [2025-03-16 13:51:25,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:25,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:51:25,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:51:25,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:25,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740498956] [2025-03-16 13:51:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740498956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942202303] [2025-03-16 13:51:25,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:25,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:25,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:25,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:51:25,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:51:25,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:51:25,669 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:25,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:25,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:51:25,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:25,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942202303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:25,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2025-03-16 13:51:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078174714] [2025-03-16 13:51:25,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:25,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 13:51:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:25,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 13:51:25,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-16 13:51:25,759 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:25,798 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2025-03-16 13:51:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:51:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:51:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:25,799 INFO L225 Difference]: With dead ends: 36 [2025-03-16 13:51:25,799 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 13:51:25,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:51:25,800 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:25,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:51:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 13:51:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2025-03-16 13:51:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-03-16 13:51:25,802 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2025-03-16 13:51:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:25,803 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-03-16 13:51:25,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-03-16 13:51:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:51:25,803 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:25,803 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:25,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:51:26,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:26,005 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:26,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1811713897, now seen corresponding path program 1 times [2025-03-16 13:51:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543768885] [2025-03-16 13:51:26,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:26,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:51:26,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:51:26,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:26,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543768885] [2025-03-16 13:51:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543768885] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049828991] [2025-03-16 13:51:26,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:26,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:26,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:26,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:51:26,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:51:26,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:51:26,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:26,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:26,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:51:26,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:26,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:51:26,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:51:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:26,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:26,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-03-16 13:51:26,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2025-03-16 13:51:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049828991] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:26,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:26,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2025-03-16 13:51:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677643130] [2025-03-16 13:51:26,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:26,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:51:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:26,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:51:26,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:51:26,677 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:26,772 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2025-03-16 13:51:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:51:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 13:51:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:26,773 INFO L225 Difference]: With dead ends: 27 [2025-03-16 13:51:26,773 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 13:51:26,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:51:26,775 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:26,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 96 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 13:51:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2025-03-16 13:51:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-16 13:51:26,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2025-03-16 13:51:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:26,780 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-16 13:51:26,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-16 13:51:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 13:51:26,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:26,780 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:26,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:51:26,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:51:26,981 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:26,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash -778651000, now seen corresponding path program 2 times [2025-03-16 13:51:26,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:26,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629161602] [2025-03-16 13:51:26,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:26,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:26,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-16 13:51:26,994 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:51:26,994 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:26,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629161602] [2025-03-16 13:51:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629161602] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383740039] [2025-03-16 13:51:27,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:27,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:27,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:27,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:27,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:51:27,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-16 13:51:27,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:51:27,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:27,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:27,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-16 13:51:27,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:27,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:51:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:27,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:51:27,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:51:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:27,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:31,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:51:31,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2025-03-16 13:51:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383740039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:31,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:31,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-16 13:51:31,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863845301] [2025-03-16 13:51:31,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:31,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:51:31,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:31,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:51:31,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=288, Unknown=1, NotChecked=0, Total=342 [2025-03-16 13:51:31,656 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:31,815 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2025-03-16 13:51:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:51:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-16 13:51:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:31,816 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:51:31,816 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 13:51:31,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=113, Invalid=486, Unknown=1, NotChecked=0, Total=600 [2025-03-16 13:51:31,817 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:31,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 70 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 13:51:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2025-03-16 13:51:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-16 13:51:31,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2025-03-16 13:51:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:31,820 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-16 13:51:31,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-16 13:51:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 13:51:31,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:31,820 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:31,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:32,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:32,025 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:32,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2084430494, now seen corresponding path program 1 times [2025-03-16 13:51:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:32,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990668397] [2025-03-16 13:51:32,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:32,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 13:51:32,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:51:32,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:32,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:32,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:32,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990668397] [2025-03-16 13:51:32,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990668397] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479568868] [2025-03-16 13:51:32,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:32,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:32,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:51:32,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 13:51:32,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:51:32,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:32,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:32,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:51:32,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:32,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479568868] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:32,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:32,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:51:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925592278] [2025-03-16 13:51:32,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:32,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:51:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:32,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:51:32,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:51:32,222 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:32,254 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2025-03-16 13:51:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:51:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 13:51:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:32,255 INFO L225 Difference]: With dead ends: 28 [2025-03-16 13:51:32,255 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 13:51:32,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:51:32,255 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 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 [2025-03-16 13:51:32,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:51:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 13:51:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-16 13:51:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2025-03-16 13:51:32,258 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2025-03-16 13:51:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:32,258 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2025-03-16 13:51:32,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2025-03-16 13:51:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:51:32,259 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:32,259 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:32,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:32,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:32,462 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:32,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash 327297507, now seen corresponding path program 2 times [2025-03-16 13:51:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234104538] [2025-03-16 13:51:32,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:32,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:32,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 13:51:32,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:51:32,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:32,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:32,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234104538] [2025-03-16 13:51:32,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234104538] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:32,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564876739] [2025-03-16 13:51:32,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:51:32,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:32,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:32,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:51:32,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 13:51:32,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:51:32,764 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:51:32,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:32,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-16 13:51:32,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:32,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:32,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:32,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:33,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:51:33,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:51:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:33,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564876739] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:33,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:33,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-03-16 13:51:33,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658440690] [2025-03-16 13:51:33,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:33,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:51:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:33,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:51:33,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:51:33,256 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:33,357 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2025-03-16 13:51:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:51:33,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:51:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:33,358 INFO L225 Difference]: With dead ends: 28 [2025-03-16 13:51:33,358 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 13:51:33,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:51:33,359 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:33,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 13:51:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 13:51:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2025-03-16 13:51:33,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2025-03-16 13:51:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:33,362 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2025-03-16 13:51:33,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2025-03-16 13:51:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:51:33,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:33,363 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:33,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:33,567 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:33,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash 727986537, now seen corresponding path program 1 times [2025-03-16 13:51:33,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330574419] [2025-03-16 13:51:33,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:33,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:33,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:51:33,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:51:33,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:33,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:51:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330574419] [2025-03-16 13:51:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330574419] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:33,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248611129] [2025-03-16 13:51:33,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:51:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:33,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:51:33,653 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:51:33,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:51:33,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:33,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:33,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 13:51:33,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:51:33,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:51:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248611129] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:33,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-16 13:51:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651912294] [2025-03-16 13:51:33,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:33,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:51:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:33,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:51:33,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:51:33,778 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:33,831 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2025-03-16 13:51:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:51:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 13:51:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:33,835 INFO L225 Difference]: With dead ends: 86 [2025-03-16 13:51:33,835 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 13:51:33,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:51:33,836 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:33,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 67 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:51:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 13:51:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 30. [2025-03-16 13:51:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-03-16 13:51:33,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2025-03-16 13:51:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:33,840 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-03-16 13:51:33,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-03-16 13:51:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:51:33,841 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:33,841 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:51:33,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:34,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:34,042 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:34,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1284433372, now seen corresponding path program 3 times [2025-03-16 13:51:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588503927] [2025-03-16 13:51:34,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:34,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:34,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 5 equivalence classes. [2025-03-16 13:51:34,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:51:34,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:51:34,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588503927] [2025-03-16 13:51:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588503927] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168764345] [2025-03-16 13:51:34,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:51:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:34,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:34,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:51:34,297 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 5 equivalence classes. [2025-03-16 13:51:34,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:51:34,312 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:51:34,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:34,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 13:51:34,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:34,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:34,450 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:51:34,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:51:34,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:34,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:38,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:51:38,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2025-03-16 13:51:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:38,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168764345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:38,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-03-16 13:51:38,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520550205] [2025-03-16 13:51:38,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:38,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:51:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:38,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:51:38,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=522, Unknown=1, NotChecked=0, Total=600 [2025-03-16 13:51:38,794 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:38,947 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2025-03-16 13:51:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:51:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 13:51:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:38,949 INFO L225 Difference]: With dead ends: 36 [2025-03-16 13:51:38,949 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:51:38,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=124, Invalid=687, Unknown=1, NotChecked=0, Total=812 [2025-03-16 13:51:38,950 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:38,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:51:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2025-03-16 13:51:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2025-03-16 13:51:38,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 18 [2025-03-16 13:51:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:38,954 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2025-03-16 13:51:38,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2025-03-16 13:51:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 13:51:38,955 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:38,955 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:51:38,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:39,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:39,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:39,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash -690072377, now seen corresponding path program 4 times [2025-03-16 13:51:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607788128] [2025-03-16 13:51:39,156 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:51:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:39,162 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-16 13:51:39,173 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:51:39,174 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:51:39,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:39,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607788128] [2025-03-16 13:51:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607788128] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340369807] [2025-03-16 13:51:39,448 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:51:39,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:39,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:51:39,482 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-16 13:51:39,496 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:51:39,496 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:51:39,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:39,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 13:51:39,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:39,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:39,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:39,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:39,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:51:39,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:51:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:40,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340369807] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:40,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:40,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-16 13:51:40,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190790752] [2025-03-16 13:51:40,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:40,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 13:51:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:40,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 13:51:40,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-16 13:51:40,087 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:40,312 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2025-03-16 13:51:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:51:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-03-16 13:51:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:40,313 INFO L225 Difference]: With dead ends: 45 [2025-03-16 13:51:40,313 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 13:51:40,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:51:40,314 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:40,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 13:51:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-16 13:51:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-03-16 13:51:40,321 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2025-03-16 13:51:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:40,321 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-03-16 13:51:40,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-03-16 13:51:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:51:40,322 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:40,322 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:51:40,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:51:40,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:51:40,523 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:40,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -172989146, now seen corresponding path program 5 times [2025-03-16 13:51:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:40,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293993296] [2025-03-16 13:51:40,523 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:40,529 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 6 equivalence classes. [2025-03-16 13:51:40,539 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:51:40,539 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-16 13:51:40,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293993296] [2025-03-16 13:51:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293993296] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858937960] [2025-03-16 13:51:40,792 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:51:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:40,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:40,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:51:40,826 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 6 equivalence classes. [2025-03-16 13:51:40,843 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:51:40,844 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-16 13:51:40,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:40,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 13:51:40,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:40,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:51:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:40,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:51:41,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:51:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:41,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:49,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:51:49,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2025-03-16 13:51:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858937960] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:49,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2025-03-16 13:51:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741177647] [2025-03-16 13:51:49,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:49,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 13:51:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:49,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 13:51:49,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=833, Unknown=1, NotChecked=0, Total=930 [2025-03-16 13:51:49,460 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:49,681 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2025-03-16 13:51:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:51:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:51:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:49,682 INFO L225 Difference]: With dead ends: 39 [2025-03-16 13:51:49,682 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 13:51:49,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=155, Invalid=1104, Unknown=1, NotChecked=0, Total=1260 [2025-03-16 13:51:49,683 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:49,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 89 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:51:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 13:51:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-03-16 13:51:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2025-03-16 13:51:49,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 23 [2025-03-16 13:51:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:49,690 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2025-03-16 13:51:49,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2025-03-16 13:51:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:51:49,691 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:49,691 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:51:49,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 13:51:49,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:49,891 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:49,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 441979525, now seen corresponding path program 6 times [2025-03-16 13:51:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459596542] [2025-03-16 13:51:49,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:49,898 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 6 equivalence classes. [2025-03-16 13:51:49,917 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:51:49,918 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:51:49,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:50,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:50,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459596542] [2025-03-16 13:51:50,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459596542] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:50,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288131516] [2025-03-16 13:51:50,201 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:51:50,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:50,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:50,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:51:50,238 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 6 equivalence classes. [2025-03-16 13:51:50,256 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:51:50,256 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:51:50,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:50,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 13:51:50,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:50,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:51:50,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:51:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:50,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:51:50,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:51:50,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:51:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:50,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288131516] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:51:50,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:51:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-16 13:51:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097039344] [2025-03-16 13:51:50,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:51:50,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 13:51:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:51:50,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 13:51:50,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 13:51:50,997 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:51:51,218 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2025-03-16 13:51:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:51:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 13:51:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:51:51,219 INFO L225 Difference]: With dead ends: 51 [2025-03-16 13:51:51,219 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:51:51,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 13:51:51,220 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:51:51,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:51:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:51:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-03-16 13:51:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2025-03-16 13:51:51,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2025-03-16 13:51:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:51:51,226 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2025-03-16 13:51:51,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:51:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2025-03-16 13:51:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 13:51:51,226 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:51:51,226 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:51:51,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:51:51,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:51:51,427 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:51:51,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:51:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1584162182, now seen corresponding path program 7 times [2025-03-16 13:51:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:51:51,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549833946] [2025-03-16 13:51:51,427 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:51:51,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 13:51:51,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 13:51:51,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:51,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:51,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:51:51,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549833946] [2025-03-16 13:51:51,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549833946] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:51:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745551633] [2025-03-16 13:51:51,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:51:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:51:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:51:51,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:51:51,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:51:51,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 13:51:51,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 13:51:51,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:51:51,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:51:51,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-16 13:51:51,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:51:51,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:51:51,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2025-03-16 13:51:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:51:51,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:51:51,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2025-03-16 13:51:52,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:51:52,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2025-03-16 13:51:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:51:52,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:06,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2025-03-16 13:52:06,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2486 treesize of output 2422 [2025-03-16 13:52:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745551633] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:06,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2025-03-16 13:52:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372167053] [2025-03-16 13:52:06,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:06,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-16 13:52:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:06,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-16 13:52:06,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1329, Unknown=5, NotChecked=0, Total=1482 [2025-03-16 13:52:06,720 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:07,024 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2025-03-16 13:52:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:52:07,025 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-16 13:52:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:07,025 INFO L225 Difference]: With dead ends: 42 [2025-03-16 13:52:07,025 INFO L226 Difference]: Without dead ends: 40 [2025-03-16 13:52:07,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=254, Invalid=1903, Unknown=5, NotChecked=0, Total=2162 [2025-03-16 13:52:07,026 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:07,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-16 13:52:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-03-16 13:52:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2025-03-16 13:52:07,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2025-03-16 13:52:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:07,038 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2025-03-16 13:52:07,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2025-03-16 13:52:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:52:07,038 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:07,038 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 13:52:07,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 13:52:07,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:52:07,239 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:07,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash 675788325, now seen corresponding path program 8 times [2025-03-16 13:52:07,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:07,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760671316] [2025-03-16 13:52:07,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:07,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:52:07,253 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:52:07,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:07,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:07,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760671316] [2025-03-16 13:52:07,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760671316] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792475753] [2025-03-16 13:52:07,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:07,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:07,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:07,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:52:07,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-16 13:52:07,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:52:07,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:07,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:07,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-16 13:52:07,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:07,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:07,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:08,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:08,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:52:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792475753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:08,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:08,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2025-03-16 13:52:08,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119135818] [2025-03-16 13:52:08,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:08,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:52:08,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:08,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:52:08,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:52:08,523 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:08,723 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2025-03-16 13:52:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:52:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 13:52:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:08,723 INFO L225 Difference]: With dead ends: 57 [2025-03-16 13:52:08,723 INFO L226 Difference]: Without dead ends: 39 [2025-03-16 13:52:08,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 13:52:08,724 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:08,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 102 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-16 13:52:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-16 13:52:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2025-03-16 13:52:08,731 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2025-03-16 13:52:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:08,731 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2025-03-16 13:52:08,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2025-03-16 13:52:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:52:08,733 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:08,733 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 13:52:08,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:08,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:52:08,938 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:08,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash -190571580, now seen corresponding path program 9 times [2025-03-16 13:52:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746301677] [2025-03-16 13:52:08,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:08,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:08,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 8 equivalence classes. [2025-03-16 13:52:08,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:52:08,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-16 13:52:08,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746301677] [2025-03-16 13:52:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746301677] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943132186] [2025-03-16 13:52:09,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:09,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:09,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:09,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:52:09,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 8 equivalence classes. [2025-03-16 13:52:09,426 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:52:09,426 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-16 13:52:09,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:09,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:52:09,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:09,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:09,630 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:52:09,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:52:09,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:09,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:18,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:52:18,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2025-03-16 13:52:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:18,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943132186] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:18,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:18,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2025-03-16 13:52:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333577139] [2025-03-16 13:52:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:18,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-16 13:52:18,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:18,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-16 13:52:18,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1825, Unknown=1, NotChecked=0, Total=1980 [2025-03-16 13:52:18,349 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:18,715 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2025-03-16 13:52:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:52:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 13:52:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:18,716 INFO L225 Difference]: With dead ends: 45 [2025-03-16 13:52:18,716 INFO L226 Difference]: Without dead ends: 43 [2025-03-16 13:52:18,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=253, Invalid=2502, Unknown=1, NotChecked=0, Total=2756 [2025-03-16 13:52:18,717 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:18,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 107 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-16 13:52:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2025-03-16 13:52:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2025-03-16 13:52:18,721 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2025-03-16 13:52:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:18,721 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2025-03-16 13:52:18,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2025-03-16 13:52:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 13:52:18,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:18,722 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 13:52:18,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:18,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 13:52:18,922 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:18,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 629698343, now seen corresponding path program 10 times [2025-03-16 13:52:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:18,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908475873] [2025-03-16 13:52:18,923 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:18,928 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-16 13:52:18,945 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 13:52:18,945 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:18,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:19,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908475873] [2025-03-16 13:52:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908475873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451357813] [2025-03-16 13:52:19,325 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:19,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:19,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:19,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:19,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:52:19,368 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-16 13:52:19,407 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 13:52:19,408 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:19,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:19,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-16 13:52:19,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:19,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:19,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:19,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:20,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:20,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:52:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451357813] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:20,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:20,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2025-03-16 13:52:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323784651] [2025-03-16 13:52:20,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:20,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:52:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:20,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:52:20,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1698, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:52:20,484 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:20,709 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2025-03-16 13:52:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:52:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-03-16 13:52:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:20,710 INFO L225 Difference]: With dead ends: 63 [2025-03-16 13:52:20,710 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 13:52:20,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 13:52:20,711 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:20,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 13:52:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-03-16 13:52:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2025-03-16 13:52:20,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2025-03-16 13:52:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:20,718 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2025-03-16 13:52:20,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2025-03-16 13:52:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:52:20,719 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:20,719 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 6, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 13:52:20,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 13:52:20,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:20,919 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:20,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:20,920 INFO L85 PathProgramCache]: Analyzing trace with hash 460698856, now seen corresponding path program 11 times [2025-03-16 13:52:20,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:20,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062070172] [2025-03-16 13:52:20,920 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:20,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:20,926 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 9 equivalence classes. [2025-03-16 13:52:20,951 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:52:20,952 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:52:20,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:21,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:21,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062070172] [2025-03-16 13:52:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062070172] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:21,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782834714] [2025-03-16 13:52:21,317 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:21,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:21,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:21,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:21,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:52:21,363 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 9 equivalence classes. [2025-03-16 13:52:21,430 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:52:21,430 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:52:21,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:21,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:52:21,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:21,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:52:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:21,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:21,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:52:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:21,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:26,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:52:26,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2025-03-16 13:52:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:26,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782834714] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:26,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:26,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2025-03-16 13:52:26,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79072285] [2025-03-16 13:52:26,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:26,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-16 13:52:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:26,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-16 13:52:26,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2192, Unknown=1, NotChecked=0, Total=2352 [2025-03-16 13:52:26,508 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:27,004 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2025-03-16 13:52:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:52:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:52:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:27,005 INFO L225 Difference]: With dead ends: 48 [2025-03-16 13:52:27,005 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 13:52:27,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=254, Invalid=2937, Unknown=1, NotChecked=0, Total=3192 [2025-03-16 13:52:27,006 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:27,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:52:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 13:52:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2025-03-16 13:52:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2025-03-16 13:52:27,014 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2025-03-16 13:52:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:27,014 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2025-03-16 13:52:27,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2025-03-16 13:52:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 13:52:27,015 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:27,015 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 6, 1, 1, 1, 1, 1] [2025-03-16 13:52:27,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 13:52:27,219 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,SelfDestructingSolverStorable16 [2025-03-16 13:52:27,219 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:27,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2034986109, now seen corresponding path program 12 times [2025-03-16 13:52:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:27,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213120135] [2025-03-16 13:52:27,220 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:27,225 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes. [2025-03-16 13:52:27,243 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:52:27,244 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 13:52:27,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:27,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:27,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213120135] [2025-03-16 13:52:27,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213120135] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000671276] [2025-03-16 13:52:27,695 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:27,697 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:27,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:52:27,742 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes. [2025-03-16 13:52:27,826 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:52:27,826 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 13:52:27,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 13:52:27,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:28,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:28,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:28,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:28,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:28,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:52:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:29,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000671276] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:29,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:29,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2025-03-16 13:52:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078260476] [2025-03-16 13:52:29,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:29,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-16 13:52:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:29,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-16 13:52:29,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 13:52:29,104 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 51 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:29,347 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2025-03-16 13:52:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:52:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 51 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-16 13:52:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:29,348 INFO L225 Difference]: With dead ends: 69 [2025-03-16 13:52:29,348 INFO L226 Difference]: Without dead ends: 45 [2025-03-16 13:52:29,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2025-03-16 13:52:29,349 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:29,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-16 13:52:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-16 13:52:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2025-03-16 13:52:29,354 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2025-03-16 13:52:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:29,354 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2025-03-16 13:52:29,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 51 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2025-03-16 13:52:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 13:52:29,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:29,355 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 7, 6, 6, 1, 1, 1, 1, 1] [2025-03-16 13:52:29,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:52:29,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:52:29,559 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:29,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1151450722, now seen corresponding path program 13 times [2025-03-16 13:52:29,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:29,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431680033] [2025-03-16 13:52:29,559 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:29,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:29,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 13:52:29,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:52:29,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:29,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431680033] [2025-03-16 13:52:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431680033] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173397975] [2025-03-16 13:52:29,988 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:29,990 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:52:30,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 13:52:30,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:52:30,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:30,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:30,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-03-16 13:52:30,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:30,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:52:30,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2025-03-16 13:52:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:30,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:52:30,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2025-03-16 13:52:30,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:52:30,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2025-03-16 13:52:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:30,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:47,751 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_163| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_163| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) |c_ULTIMATE.start_main_~j~0#1|) (+ (* |v_ULTIMATE.start_main_~i~0#1_163| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) |v_ULTIMATE.start_main_~j~0#1_145|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)) |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_163| 1)))) is different from false [2025-03-16 13:52:47,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2025-03-16 13:52:47,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 294 [2025-03-16 13:52:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2025-03-16 13:52:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173397975] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:48,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2025-03-16 13:52:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468853970] [2025-03-16 13:52:48,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:48,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-16 13:52:48,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:48,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-16 13:52:48,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2864, Unknown=3, NotChecked=108, Total=3192 [2025-03-16 13:52:48,220 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:48,937 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2025-03-16 13:52:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:52:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-16 13:52:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:48,938 INFO L225 Difference]: With dead ends: 51 [2025-03-16 13:52:48,938 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 13:52:48,939 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=355, Invalid=4068, Unknown=3, NotChecked=130, Total=4556 [2025-03-16 13:52:48,939 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:48,939 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 210 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1099 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2025-03-16 13:52:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 13:52:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-03-16 13:52:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2025-03-16 13:52:48,944 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2025-03-16 13:52:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:48,944 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2025-03-16 13:52:48,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2025-03-16 13:52:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 13:52:48,945 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:48,945 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 13:52:48,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:49,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:49,145 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:49,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1034461239, now seen corresponding path program 14 times [2025-03-16 13:52:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994771460] [2025-03-16 13:52:49,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:49,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 13:52:49,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:52:49,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:49,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 45 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:49,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994771460] [2025-03-16 13:52:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994771460] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822510952] [2025-03-16 13:52:49,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:49,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:52:49,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 13:52:49,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 13:52:49,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:49,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:49,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 13:52:49,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:49,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:50,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 70 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:50,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:50,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:50,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:52:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822510952] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:51,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:51,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2025-03-16 13:52:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830602892] [2025-03-16 13:52:51,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:51,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-03-16 13:52:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:51,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-03-16 13:52:51,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2817, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 13:52:51,185 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:51,567 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2025-03-16 13:52:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:52:51,567 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2025-03-16 13:52:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:51,567 INFO L225 Difference]: With dead ends: 76 [2025-03-16 13:52:51,568 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 13:52:51,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 13:52:51,569 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:51,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 168 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:52:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 13:52:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-16 13:52:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2025-03-16 13:52:51,574 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2025-03-16 13:52:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:51,574 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2025-03-16 13:52:51,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2025-03-16 13:52:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:52:51,575 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:51,575 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 13:52:51,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 13:52:51,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:51,776 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:51,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1352946179, now seen corresponding path program 2 times [2025-03-16 13:52:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:51,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759812477] [2025-03-16 13:52:51,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:51,782 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:52:51,786 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:52:51,786 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:51,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:52:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759812477] [2025-03-16 13:52:51,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759812477] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:51,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690691315] [2025-03-16 13:52:51,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:51,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:51,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:52:51,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:52:51,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:52:51,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:51,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:51,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:52:51,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:52:52,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:52:52,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690691315] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:52,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:52,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2025-03-16 13:52:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129110395] [2025-03-16 13:52:52,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:52,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 13:52:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:52,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 13:52:52,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:52:52,258 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:52,379 INFO L93 Difference]: Finished difference Result 410 states and 435 transitions. [2025-03-16 13:52:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:52:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:52:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:52,381 INFO L225 Difference]: With dead ends: 410 [2025-03-16 13:52:52,382 INFO L226 Difference]: Without dead ends: 384 [2025-03-16 13:52:52,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:52:52,383 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 150 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:52,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 127 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-16 13:52:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 72. [2025-03-16 13:52:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2025-03-16 13:52:52,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 47 [2025-03-16 13:52:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:52,398 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2025-03-16 13:52:52,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2025-03-16 13:52:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 13:52:52,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:52,399 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 13:52:52,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:52,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:52,603 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:52,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -660789174, now seen corresponding path program 15 times [2025-03-16 13:52:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:52,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676283725] [2025-03-16 13:52:52,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:52,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 11 equivalence classes. [2025-03-16 13:52:52,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 13:52:52,634 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-16 13:52:52,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:53,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676283725] [2025-03-16 13:52:53,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676283725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:53,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300685542] [2025-03-16 13:52:53,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:53,056 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:53,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 13:52:53,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 11 equivalence classes. [2025-03-16 13:52:53,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 13:52:53,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-16 13:52:53,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:53,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-16 13:52:53,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:53,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:53,478 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:52:53,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:52:53,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:53,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:54,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:52:54,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2025-03-16 13:52:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:54,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300685542] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:54,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2025-03-16 13:52:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864501347] [2025-03-16 13:52:54,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:54,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-16 13:52:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:54,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-16 13:52:54,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3457, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 13:52:54,438 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:55,105 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2025-03-16 13:52:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:52:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-03-16 13:52:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:55,106 INFO L225 Difference]: With dead ends: 78 [2025-03-16 13:52:55,106 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 13:52:55,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=4648, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:52:55,109 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:55,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 322 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:52:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 13:52:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2025-03-16 13:52:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2025-03-16 13:52:55,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 48 [2025-03-16 13:52:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:55,120 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2025-03-16 13:52:55,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2025-03-16 13:52:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:52:55,121 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:55,121 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 8, 8, 1, 1, 1, 1, 1] [2025-03-16 13:52:55,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 13:52:55,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 13:52:55,321 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:55,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292255, now seen corresponding path program 16 times [2025-03-16 13:52:55,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:55,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739730150] [2025-03-16 13:52:55,322 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:55,328 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-03-16 13:52:55,348 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:52:55,348 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:55,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:55,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739730150] [2025-03-16 13:52:55,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739730150] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646777320] [2025-03-16 13:52:55,874 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:55,875 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:55,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 13:52:55,933 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-03-16 13:52:56,002 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:52:56,002 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:56,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:56,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-16 13:52:56,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:56,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:52:56,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-16 13:52:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 92 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:56,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:57,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:52:57,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2025-03-16 13:52:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:57,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646777320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:57,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:57,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2025-03-16 13:52:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771582383] [2025-03-16 13:52:57,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:57,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 13:52:57,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:57,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 13:52:57,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=3342, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 13:52:57,459 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:57,703 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2025-03-16 13:52:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 13:52:57,703 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:52:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:57,703 INFO L225 Difference]: With dead ends: 105 [2025-03-16 13:52:57,703 INFO L226 Difference]: Without dead ends: 75 [2025-03-16 13:52:57,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=724, Invalid=3436, Unknown=0, NotChecked=0, Total=4160 [2025-03-16 13:52:57,705 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:57,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 91 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-16 13:52:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-16 13:52:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2025-03-16 13:52:57,715 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 51 [2025-03-16 13:52:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:57,716 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2025-03-16 13:52:57,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2025-03-16 13:52:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 13:52:57,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:57,716 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 9, 8, 8, 1, 1, 1, 1, 1] [2025-03-16 13:52:57,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 13:52:57,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-16 13:52:57,917 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:57,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:57,917 INFO L85 PathProgramCache]: Analyzing trace with hash -891736832, now seen corresponding path program 17 times [2025-03-16 13:52:57,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:57,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795847482] [2025-03-16 13:52:57,917 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:57,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-16 13:52:57,943 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:52:57,943 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-16 13:52:57,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795847482] [2025-03-16 13:52:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795847482] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828283462] [2025-03-16 13:52:58,457 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:58,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:58,459 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:52:58,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 13:52:58,520 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 12 equivalence classes. [2025-03-16 13:52:58,577 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 13:52:58,578 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-16 13:52:58,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:58,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-03-16 13:52:58,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:58,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:52:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:52:58,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:52:59,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:52:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:59,371 INFO L312 TraceCheckSpWp]: Computing backward predicates...