./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:41:31,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:41:31,816 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:41:31,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:41:31,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:41:31,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:41:31,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:41:31,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:41:31,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:41:31,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:41:31,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:41:31,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:41:31,837 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:41:31,838 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:41:31,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:41:31,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:41:31,839 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:41:31,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:41:31,840 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 -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2025-03-08 00:41:32,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:41:32,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:41:32,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:41:32,077 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:41:32,077 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:41:32,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2025-03-08 00:41:33,245 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869aff0ae/ec5b3b048142456796e9431de53b79aa/FLAG5ef704376 [2025-03-08 00:41:33,483 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:41:33,484 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2025-03-08 00:41:33,489 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869aff0ae/ec5b3b048142456796e9431de53b79aa/FLAG5ef704376 [2025-03-08 00:41:33,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869aff0ae/ec5b3b048142456796e9431de53b79aa [2025-03-08 00:41:33,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:41:33,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:41:33,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:41:33,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:41:33,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:41:33,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:33,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@340f4e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33, skipping insertion in model container [2025-03-08 00:41:33,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:33,843 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:41:33,943 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_ind.c[414,427] [2025-03-08 00:41:33,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:41:33,964 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:41:33,972 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_ind.c[414,427] [2025-03-08 00:41:33,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:41:33,988 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:41:33,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33 WrapperNode [2025-03-08 00:41:33,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:41:33,990 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:41:33,990 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:41:33,990 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:41:33,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:33,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,011 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2025-03-08 00:41:34,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:41:34,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:41:34,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:41:34,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:41:34,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,021 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,029 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]. [2025-03-08 00:41:34,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,036 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:41:34,041 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:41:34,041 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:41:34,041 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:41:34,045 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (1/1) ... [2025-03-08 00:41:34,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:41:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:34,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 00:41:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 00:41:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:41:34,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:41:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:41:34,133 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:41:34,135 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:41:34,234 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-08 00:41:34,238 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-08 00:41:34,238 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:41:34,243 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:41:34,243 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:41:34,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:41:34 BoogieIcfgContainer [2025-03-08 00:41:34,243 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:41:34,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:41:34,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:41:34,248 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:41:34,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:41:33" (1/3) ... [2025-03-08 00:41:34,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdcb760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:41:34, skipping insertion in model container [2025-03-08 00:41:34,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:41:33" (2/3) ... [2025-03-08 00:41:34,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdcb760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:41:34, skipping insertion in model container [2025-03-08 00:41:34,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:41:34" (3/3) ... [2025-03-08 00:41:34,250 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2025-03-08 00:41:34,261 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:41:34,262 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_var_plus_ind.c that has 1 procedures, 13 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 00:41:34,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:41:34,301 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;@1fd21d9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:41:34,302 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:41:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 00:41:34,310 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:34,310 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:34,311 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:34,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1039786094, now seen corresponding path program 1 times [2025-03-08 00:41:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:34,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186233181] [2025-03-08 00:41:34,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:34,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 00:41:34,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 00:41:34,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:34,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186233181] [2025-03-08 00:41:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186233181] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:41:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:41:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:41:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652635171] [2025-03-08 00:41:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:41:34,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:41:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:34,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:41:34,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:41:34,520 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2025-03-08 00:41:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:34,558 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2025-03-08 00:41:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:41:34,560 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 [2025-03-08 00:41:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:34,564 INFO L225 Difference]: With dead ends: 30 [2025-03-08 00:41:34,565 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 00:41:34,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:41:34,572 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:34,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 00:41:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2025-03-08 00:41:34,592 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) [2025-03-08 00:41:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-03-08 00:41:34,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2025-03-08 00:41:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:34,597 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-03-08 00:41:34,597 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) [2025-03-08 00:41:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-03-08 00:41:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-08 00:41:34,598 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:34,598 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:34,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:41:34,599 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:34,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2141847483, now seen corresponding path program 1 times [2025-03-08 00:41:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:34,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722721333] [2025-03-08 00:41:34,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:34,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 00:41:34,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 00:41:34,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:34,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:34,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:34,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722721333] [2025-03-08 00:41:34,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722721333] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:41:34,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:41:34,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:41:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791044090] [2025-03-08 00:41:34,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:41:34,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:41:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:34,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:41:34,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:41:34,691 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:34,713 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2025-03-08 00:41:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:41:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-08 00:41:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:34,714 INFO L225 Difference]: With dead ends: 19 [2025-03-08 00:41:34,714 INFO L226 Difference]: Without dead ends: 12 [2025-03-08 00:41:34,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:41:34,715 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:34,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-03-08 00:41:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-03-08 00:41:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-03-08 00:41:34,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2025-03-08 00:41:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:34,718 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-03-08 00:41:34,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-03-08 00:41:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 00:41:34,718 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:34,718 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:34,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:41:34,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:34,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2035593711, now seen corresponding path program 1 times [2025-03-08 00:41:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:34,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248888336] [2025-03-08 00:41:34,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:34,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 00:41:34,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 00:41:34,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:34,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:34,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248888336] [2025-03-08 00:41:34,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248888336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532204870] [2025-03-08 00:41:34,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:34,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:41:34,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 00:41:34,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 00:41:34,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:34,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:34,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:41:34,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:34,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:34,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532204870] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:34,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2025-03-08 00:41:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267078701] [2025-03-08 00:41:34,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:34,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:41:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:35,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:41:35,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:41:35,000 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2025-03-08 00:41:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:35,091 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2025-03-08 00:41:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:41:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-08 00:41:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:35,092 INFO L225 Difference]: With dead ends: 37 [2025-03-08 00:41:35,092 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 00:41:35,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:41:35,093 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 89 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:35,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 00:41:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2025-03-08 00:41:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2025-03-08 00:41:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-03-08 00:41:35,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2025-03-08 00:41:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:35,096 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-03-08 00:41:35,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2025-03-08 00:41:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-03-08 00:41:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 00:41:35,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:35,097 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:35,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:35,297 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 [2025-03-08 00:41:35,298 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:35,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash -582250183, now seen corresponding path program 1 times [2025-03-08 00:41:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730207749] [2025-03-08 00:41:35,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:35,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:41:35,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:41:35,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:35,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:35,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:35,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730207749] [2025-03-08 00:41:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730207749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:35,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910988598] [2025-03-08 00:41:35,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:35,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:35,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:35,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:35,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:41:35,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 00:41:35,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 00:41:35,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:35,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:35,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 00:41:35,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:35,689 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 [2025-03-08 00:41:35,758 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 [2025-03-08 00:41:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:35,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:35,807 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 18 treesize of output 16 [2025-03-08 00:41:35,809 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 24 treesize of output 20 [2025-03-08 00:41:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910988598] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:35,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:35,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-08 00:41:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146946095] [2025-03-08 00:41:35,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:35,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:41:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:35,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:41:35,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:41:35,845 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:35,939 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2025-03-08 00:41:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:41:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12 [2025-03-08 00:41:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:35,940 INFO L225 Difference]: With dead ends: 28 [2025-03-08 00:41:35,940 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 00:41:35,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:41:35,941 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:35,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 00:41:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2025-03-08 00:41:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-03-08 00:41:35,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2025-03-08 00:41:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:35,945 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-03-08 00:41:35,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-03-08 00:41:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 00:41:35,945 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:35,945 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:35,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 00:41:36,146 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 [2025-03-08 00:41:36,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:36,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 724338776, now seen corresponding path program 2 times [2025-03-08 00:41:36,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:36,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760108236] [2025-03-08 00:41:36,147 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:36,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 00:41:36,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 00:41:36,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:36,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:36,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760108236] [2025-03-08 00:41:36,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760108236] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:36,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317057676] [2025-03-08 00:41:36,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:36,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:36,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:36,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:36,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:41:36,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 00:41:36,399 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 00:41:36,399 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:36,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:36,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 00:41:36,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:36,459 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 [2025-03-08 00:41:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:36,493 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 [2025-03-08 00:41:36,555 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 [2025-03-08 00:41:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:36,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:36,645 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 25 treesize of output 23 [2025-03-08 00:41:36,648 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 118 treesize of output 110 [2025-03-08 00:41:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317057676] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:36,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-08 00:41:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659841457] [2025-03-08 00:41:36,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:36,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 00:41:36,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:36,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 00:41:36,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:41:36,702 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:36,798 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2025-03-08 00:41:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:41:36,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-08 00:41:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:36,799 INFO L225 Difference]: With dead ends: 25 [2025-03-08 00:41:36,799 INFO L226 Difference]: Without dead ends: 23 [2025-03-08 00:41:36,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2025-03-08 00:41:36,800 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:36,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-08 00:41:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2025-03-08 00:41:36,804 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) [2025-03-08 00:41:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-08 00:41:36,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2025-03-08 00:41:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:36,805 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-08 00:41:36,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-08 00:41:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 00:41:36,807 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:36,807 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:36,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:37,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:37,007 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:37,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1558579602, now seen corresponding path program 1 times [2025-03-08 00:41:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:37,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240530748] [2025-03-08 00:41:37,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:37,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:41:37,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:41:37,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:37,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240530748] [2025-03-08 00:41:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240530748] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137132650] [2025-03-08 00:41:37,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:37,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:37,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:37,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:41:37,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:41:37,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:41:37,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:37,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:37,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:41:37,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:37,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:37,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137132650] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:37,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:37,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-08 00:41:37,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003337727] [2025-03-08 00:41:37,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:37,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:41:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:37,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:41:37,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:41:37,197 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:37,220 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2025-03-08 00:41:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:41:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-08 00:41:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:37,221 INFO L225 Difference]: With dead ends: 29 [2025-03-08 00:41:37,221 INFO L226 Difference]: Without dead ends: 19 [2025-03-08 00:41:37,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:41:37,222 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:37,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-08 00:41:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-08 00:41:37,224 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) [2025-03-08 00:41:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2025-03-08 00:41:37,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2025-03-08 00:41:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:37,225 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2025-03-08 00:41:37,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2025-03-08 00:41:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 00:41:37,226 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:37,226 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:37,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:37,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:37,427 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:37,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 861653523, now seen corresponding path program 2 times [2025-03-08 00:41:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:37,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634572098] [2025-03-08 00:41:37,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:37,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:37,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 00:41:37,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 00:41:37,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:37,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634572098] [2025-03-08 00:41:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634572098] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720774139] [2025-03-08 00:41:37,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:37,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:37,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:41:37,728 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 00:41:37,741 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 00:41:37,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:37,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:37,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:41:37,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:37,782 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 23 treesize of output 1 [2025-03-08 00:41:37,920 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:41:37,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:41:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:37,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:38,075 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 20 treesize of output 18 [2025-03-08 00:41:38,079 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 20 [2025-03-08 00:41:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720774139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:38,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:38,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-08 00:41:38,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275425406] [2025-03-08 00:41:38,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:38,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:41:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:38,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:41:38,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:41:38,218 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) 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) [2025-03-08 00:41:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:38,357 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2025-03-08 00:41:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:41:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) 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 17 [2025-03-08 00:41:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:38,358 INFO L225 Difference]: With dead ends: 29 [2025-03-08 00:41:38,359 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 00:41:38,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:41:38,360 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:38,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 00:41:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-08 00:41:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2025-03-08 00:41:38,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2025-03-08 00:41:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:38,363 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2025-03-08 00:41:38,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) 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) [2025-03-08 00:41:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2025-03-08 00:41:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 00:41:38,364 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:38,364 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:38,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 00:41:38,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:38,565 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:38,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 113153849, now seen corresponding path program 1 times [2025-03-08 00:41:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:38,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576015352] [2025-03-08 00:41:38,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:38,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:38,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 00:41:38,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:41:38,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:38,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 00:41:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576015352] [2025-03-08 00:41:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576015352] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251747631] [2025-03-08 00:41:38,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:41:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:38,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:38,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:41:38,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 00:41:38,671 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:41:38,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:38,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:38,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 00:41:38,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 00:41:38,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 00:41:38,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251747631] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:38,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:38,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-08 00:41:38,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126426036] [2025-03-08 00:41:38,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:38,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 00:41:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:38,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 00:41:38,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2025-03-08 00:41:38,790 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:38,912 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2025-03-08 00:41:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:41:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-08 00:41:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:38,913 INFO L225 Difference]: With dead ends: 87 [2025-03-08 00:41:38,913 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 00:41:38,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2025-03-08 00:41:38,913 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 142 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:38,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 00:41:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 31. [2025-03-08 00:41:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2025-03-08 00:41:38,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2025-03-08 00:41:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:38,919 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2025-03-08 00:41:38,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2025-03-08 00:41:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 00:41:38,920 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:38,920 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:38,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:39,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:39,121 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:39,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1130589780, now seen corresponding path program 3 times [2025-03-08 00:41:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:39,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41604990] [2025-03-08 00:41:39,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:39,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:39,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 5 equivalence classes. [2025-03-08 00:41:39,144 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 00:41:39,144 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:41:39,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41604990] [2025-03-08 00:41:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41604990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360759381] [2025-03-08 00:41:39,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:39,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:39,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:41:39,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:41:39,386 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 5 equivalence classes. [2025-03-08 00:41:39,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 00:41:39,401 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:41:39,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:39,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 00:41:39,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:39,473 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 [2025-03-08 00:41:39,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:39,503 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 [2025-03-08 00:41:39,615 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 [2025-03-08 00:41:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:39,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:39,748 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 25 treesize of output 23 [2025-03-08 00:41:39,752 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 118 treesize of output 110 [2025-03-08 00:41:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360759381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:39,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:39,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2025-03-08 00:41:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583822029] [2025-03-08 00:41:39,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:39,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 00:41:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:39,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 00:41:39,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:41:39,838 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:40,003 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2025-03-08 00:41:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:41:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-08 00:41:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:40,005 INFO L225 Difference]: With dead ends: 37 [2025-03-08 00:41:40,005 INFO L226 Difference]: Without dead ends: 35 [2025-03-08 00:41:40,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2025-03-08 00:41:40,007 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:40,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-08 00:41:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2025-03-08 00:41:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2025-03-08 00:41:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-03-08 00:41:40,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 19 [2025-03-08 00:41:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:40,014 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-03-08 00:41:40,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-03-08 00:41:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 00:41:40,015 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:40,015 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:40,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:40,217 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 [2025-03-08 00:41:40,218 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:40,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 267473559, now seen corresponding path program 4 times [2025-03-08 00:41:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197872604] [2025-03-08 00:41:40,218 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:40,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:40,225 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-08 00:41:40,238 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 00:41:40,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:40,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:40,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:40,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197872604] [2025-03-08 00:41:40,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197872604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:40,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408710585] [2025-03-08 00:41:40,466 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:40,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:40,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:40,468 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) [2025-03-08 00:41:40,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:41:40,502 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-08 00:41:40,517 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 00:41:40,517 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:40,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:40,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 00:41:40,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:40,567 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 23 treesize of output 1 [2025-03-08 00:41:40,726 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:41:40,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:41:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:40,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:40,894 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 20 treesize of output 18 [2025-03-08 00:41:40,896 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 20 [2025-03-08 00:41:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:41,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408710585] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:41,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:41,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2025-03-08 00:41:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870244522] [2025-03-08 00:41:41,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:41,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 00:41:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:41,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 00:41:41,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:41:41,033 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:41,457 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2025-03-08 00:41:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:41:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-08 00:41:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:41,458 INFO L225 Difference]: With dead ends: 46 [2025-03-08 00:41:41,458 INFO L226 Difference]: Without dead ends: 34 [2025-03-08 00:41:41,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:41:41,458 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:41,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:41:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-08 00:41:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-08 00:41:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2025-03-08 00:41:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2025-03-08 00:41:41,463 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2025-03-08 00:41:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:41,463 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2025-03-08 00:41:41,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2025-03-08 00:41:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 00:41:41,464 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:41,464 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:41,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 00:41:41,665 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 [2025-03-08 00:41:41,665 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:41,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash 905654006, now seen corresponding path program 5 times [2025-03-08 00:41:41,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:41,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323342464] [2025-03-08 00:41:41,665 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:41,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:41,670 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 6 equivalence classes. [2025-03-08 00:41:41,677 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:41:41,678 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 00:41:41,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323342464] [2025-03-08 00:41:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323342464] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799822765] [2025-03-08 00:41:41,882 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:41,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:41,884 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) [2025-03-08 00:41:41,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:41:41,920 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 6 equivalence classes. [2025-03-08 00:41:41,939 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:41:41,939 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 00:41:41,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:41,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 00:41:41,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:42,017 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 [2025-03-08 00:41:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:42,042 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 [2025-03-08 00:41:42,136 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 [2025-03-08 00:41:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:42,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:42,254 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 25 treesize of output 23 [2025-03-08 00:41:42,257 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 118 treesize of output 110 [2025-03-08 00:41:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:42,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799822765] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:42,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:42,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-03-08 00:41:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438987223] [2025-03-08 00:41:42,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:42,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 00:41:42,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:42,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 00:41:42,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2025-03-08 00:41:42,363 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:42,527 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2025-03-08 00:41:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:41:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 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 24 [2025-03-08 00:41:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:42,528 INFO L225 Difference]: With dead ends: 40 [2025-03-08 00:41:42,528 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 00:41:42,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 00:41:42,529 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:42,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 100 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 00:41:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2025-03-08 00:41:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2025-03-08 00:41:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2025-03-08 00:41:42,533 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2025-03-08 00:41:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:42,533 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2025-03-08 00:41:42,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2025-03-08 00:41:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 00:41:42,535 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:42,535 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:42,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:42,740 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 [2025-03-08 00:41:42,740 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:42,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -645187915, now seen corresponding path program 6 times [2025-03-08 00:41:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518772689] [2025-03-08 00:41:42,740 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:42,746 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 6 equivalence classes. [2025-03-08 00:41:42,757 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:41:42,758 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 00:41:42,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:43,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518772689] [2025-03-08 00:41:43,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518772689] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834408686] [2025-03-08 00:41:43,005 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:43,007 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) [2025-03-08 00:41:43,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:41:43,043 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 6 equivalence classes. [2025-03-08 00:41:43,061 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:41:43,061 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 00:41:43,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:43,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 00:41:43,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:43,146 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 [2025-03-08 00:41:43,181 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2025-03-08 00:41:43,181 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 42 treesize of output 26 [2025-03-08 00:41:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:43,625 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2025-03-08 00:41:43,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 32 [2025-03-08 00:41:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:43,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:43,905 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 [2025-03-08 00:41:43,910 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 56 treesize of output 50 [2025-03-08 00:41:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:44,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834408686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:44,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:44,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2025-03-08 00:41:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987984490] [2025-03-08 00:41:44,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:44,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 00:41:44,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:44,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 00:41:44,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 00:41:44,117 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:44,709 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2025-03-08 00:41:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:41:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-08 00:41:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:44,710 INFO L225 Difference]: With dead ends: 65 [2025-03-08 00:41:44,710 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 00:41:44,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2025-03-08 00:41:44,711 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:44,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 83 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 00:41:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-03-08 00:41:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2025-03-08 00:41:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2025-03-08 00:41:44,714 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2025-03-08 00:41:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:44,714 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2025-03-08 00:41:44,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2025-03-08 00:41:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 00:41:44,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:44,715 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:44,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 00:41:44,917 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 [2025-03-08 00:41:44,917 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:44,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash -631404425, now seen corresponding path program 7 times [2025-03-08 00:41:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:44,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977553955] [2025-03-08 00:41:44,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:44,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:44,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 00:41:44,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 00:41:44,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:44,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:45,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977553955] [2025-03-08 00:41:45,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977553955] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:45,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533540313] [2025-03-08 00:41:45,225 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:45,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:45,227 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) [2025-03-08 00:41:45,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:41:45,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 00:41:45,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 00:41:45,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:45,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:45,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 00:41:45,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:45,385 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 [2025-03-08 00:41:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:45,407 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 [2025-03-08 00:41:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:45,432 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 [2025-03-08 00:41:45,537 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 [2025-03-08 00:41:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:45,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:45,728 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 32 treesize of output 30 [2025-03-08 00:41:45,730 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 486 treesize of output 470 [2025-03-08 00:41:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533540313] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:45,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2025-03-08 00:41:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54919994] [2025-03-08 00:41:45,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:45,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-08 00:41:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:45,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-08 00:41:45,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 00:41:45,873 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 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) [2025-03-08 00:41:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:46,122 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2025-03-08 00:41:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:41:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-08 00:41:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:46,123 INFO L225 Difference]: With dead ends: 43 [2025-03-08 00:41:46,123 INFO L226 Difference]: Without dead ends: 41 [2025-03-08 00:41:46,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 00:41:46,124 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:46,124 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 149 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-08 00:41:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-08 00:41:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 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) [2025-03-08 00:41:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2025-03-08 00:41:46,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2025-03-08 00:41:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:46,129 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2025-03-08 00:41:46,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 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) [2025-03-08 00:41:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2025-03-08 00:41:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-08 00:41:46,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:46,129 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:46,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:46,331 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 [2025-03-08 00:41:46,331 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:46,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1788404116, now seen corresponding path program 8 times [2025-03-08 00:41:46,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:46,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80035591] [2025-03-08 00:41:46,331 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:46,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-08 00:41:46,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 00:41:46,350 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:46,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:46,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80035591] [2025-03-08 00:41:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80035591] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804636453] [2025-03-08 00:41:46,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:46,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:46,653 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) [2025-03-08 00:41:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:41:46,693 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-08 00:41:46,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 00:41:46,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:46,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:46,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-08 00:41:46,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:46,847 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 [2025-03-08 00:41:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:46,872 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 [2025-03-08 00:41:47,052 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 [2025-03-08 00:41:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:47,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:47,241 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 25 treesize of output 23 [2025-03-08 00:41:47,246 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 54 treesize of output 50 [2025-03-08 00:41:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804636453] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:47,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2025-03-08 00:41:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043880790] [2025-03-08 00:41:47,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:47,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 00:41:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:47,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 00:41:47,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1662, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 00:41:47,393 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:47,695 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2025-03-08 00:41:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:41:47,695 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-08 00:41:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:47,696 INFO L225 Difference]: With dead ends: 46 [2025-03-08 00:41:47,696 INFO L226 Difference]: Without dead ends: 44 [2025-03-08 00:41:47,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 00:41:47,698 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:47,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-08 00:41:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-03-08 00:41:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2025-03-08 00:41:47,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2025-03-08 00:41:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:47,703 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2025-03-08 00:41:47,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2025-03-08 00:41:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 00:41:47,704 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:47,704 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:47,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 00:41:47,906 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 [2025-03-08 00:41:47,906 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:47,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -721414313, now seen corresponding path program 9 times [2025-03-08 00:41:47,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:47,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906851245] [2025-03-08 00:41:47,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:47,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes. [2025-03-08 00:41:47,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 00:41:47,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-08 00:41:47,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:48,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:48,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906851245] [2025-03-08 00:41:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906851245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:48,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959288371] [2025-03-08 00:41:48,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:48,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:48,300 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) [2025-03-08 00:41:48,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:41:48,339 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes. [2025-03-08 00:41:48,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 00:41:48,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-08 00:41:48,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:48,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 00:41:48,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:48,509 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 23 treesize of output 1 [2025-03-08 00:41:48,874 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:41:48,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:41:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:48,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:49,208 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 20 treesize of output 18 [2025-03-08 00:41:49,211 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 20 [2025-03-08 00:41:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959288371] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:49,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:49,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2025-03-08 00:41:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283628863] [2025-03-08 00:41:49,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:49,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 00:41:49,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:49,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 00:41:49,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:41:49,473 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:49,803 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2025-03-08 00:41:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 00:41:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-08 00:41:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:49,804 INFO L225 Difference]: With dead ends: 64 [2025-03-08 00:41:49,804 INFO L226 Difference]: Without dead ends: 43 [2025-03-08 00:41:49,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=470, Invalid=2500, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 00:41:49,805 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:49,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-08 00:41:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-03-08 00:41:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2025-03-08 00:41:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2025-03-08 00:41:49,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2025-03-08 00:41:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:49,810 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2025-03-08 00:41:49,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2025-03-08 00:41:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-08 00:41:49,810 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:49,810 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:49,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:50,015 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 [2025-03-08 00:41:50,015 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:50,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash -878440168, now seen corresponding path program 10 times [2025-03-08 00:41:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278454758] [2025-03-08 00:41:50,015 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:50,023 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 00:41:50,034 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 00:41:50,034 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:50,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:50,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:50,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278454758] [2025-03-08 00:41:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278454758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:50,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903147681] [2025-03-08 00:41:50,370 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:50,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:50,373 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) [2025-03-08 00:41:50,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:41:50,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-08 00:41:50,462 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 00:41:50,463 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:50,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:50,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 00:41:50,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:50,500 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 [2025-03-08 00:41:50,530 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:50,530 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 [2025-03-08 00:41:50,686 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 [2025-03-08 00:41:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:50,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:50,918 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 25 treesize of output 23 [2025-03-08 00:41:50,921 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 54 treesize of output 50 [2025-03-08 00:41:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:51,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903147681] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:51,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:51,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2025-03-08 00:41:51,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057432488] [2025-03-08 00:41:51,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:51,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 00:41:51,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:51,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 00:41:51,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 00:41:51,119 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 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) [2025-03-08 00:41:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:51,458 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2025-03-08 00:41:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 00:41:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 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 39 [2025-03-08 00:41:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:51,459 INFO L225 Difference]: With dead ends: 49 [2025-03-08 00:41:51,460 INFO L226 Difference]: Without dead ends: 47 [2025-03-08 00:41:51,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:41:51,461 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:51,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 185 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-08 00:41:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2025-03-08 00:41:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2025-03-08 00:41:51,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2025-03-08 00:41:51,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:51,473 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2025-03-08 00:41:51,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 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) [2025-03-08 00:41:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2025-03-08 00:41:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 00:41:51,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:51,474 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:51,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:51,678 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 [2025-03-08 00:41:51,678 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:51,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -374437549, now seen corresponding path program 11 times [2025-03-08 00:41:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016969328] [2025-03-08 00:41:51,679 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:51,685 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 9 equivalence classes. [2025-03-08 00:41:51,713 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:41:51,713 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:41:51,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016969328] [2025-03-08 00:41:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016969328] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148249200] [2025-03-08 00:41:52,068 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:52,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:52,070 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) [2025-03-08 00:41:52,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:41:52,116 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 9 equivalence classes. [2025-03-08 00:41:52,159 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:41:52,159 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:41:52,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:52,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 00:41:52,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:52,378 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 [2025-03-08 00:41:52,661 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 [2025-03-08 00:41:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:52,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:52,918 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 18 treesize of output 16 [2025-03-08 00:41:52,919 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 24 treesize of output 20 [2025-03-08 00:41:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148249200] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:53,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:53,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2025-03-08 00:41:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248093294] [2025-03-08 00:41:53,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:53,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-08 00:41:53,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:53,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-08 00:41:53,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 00:41:53,145 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:53,526 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2025-03-08 00:41:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:41:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 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 42 [2025-03-08 00:41:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:53,527 INFO L225 Difference]: With dead ends: 75 [2025-03-08 00:41:53,527 INFO L226 Difference]: Without dead ends: 73 [2025-03-08 00:41:53,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=2575, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 00:41:53,528 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:53,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 434 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-03-08 00:41:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2025-03-08 00:41:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2025-03-08 00:41:53,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2025-03-08 00:41:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:53,538 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2025-03-08 00:41:53,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2025-03-08 00:41:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 00:41:53,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:53,539 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:53,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:53,739 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 [2025-03-08 00:41:53,739 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:53,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -789217230, now seen corresponding path program 12 times [2025-03-08 00:41:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266709164] [2025-03-08 00:41:53,740 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:53,747 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 10 equivalence classes. [2025-03-08 00:41:53,774 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:41:53,774 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-08 00:41:53,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:54,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:54,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266709164] [2025-03-08 00:41:54,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266709164] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136928587] [2025-03-08 00:41:54,148 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:54,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:54,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:54,149 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) [2025-03-08 00:41:54,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:41:54,197 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 10 equivalence classes. [2025-03-08 00:41:54,267 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:41:54,267 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-08 00:41:54,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:54,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 00:41:54,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:54,325 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 [2025-03-08 00:41:54,364 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:54,365 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 [2025-03-08 00:41:54,553 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 [2025-03-08 00:41:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:54,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:54,791 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 25 treesize of output 23 [2025-03-08 00:41:54,796 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 54 treesize of output 50 [2025-03-08 00:41:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:55,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136928587] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:55,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:55,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2025-03-08 00:41:55,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427752579] [2025-03-08 00:41:55,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:55,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 00:41:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:55,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 00:41:55,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2103, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:41:55,033 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:55,493 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2025-03-08 00:41:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:41:55,493 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 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 44 [2025-03-08 00:41:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:55,493 INFO L225 Difference]: With dead ends: 73 [2025-03-08 00:41:55,493 INFO L226 Difference]: Without dead ends: 71 [2025-03-08 00:41:55,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:41:55,495 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:55,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 279 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-08 00:41:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2025-03-08 00:41:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2025-03-08 00:41:55,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2025-03-08 00:41:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:55,501 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2025-03-08 00:41:55,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2025-03-08 00:41:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:41:55,503 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:55,503 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:55,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:55,707 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 [2025-03-08 00:41:55,707 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:55,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash -838081736, now seen corresponding path program 13 times [2025-03-08 00:41:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:55,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697049830] [2025-03-08 00:41:55,708 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:55,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:55,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 00:41:55,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:41:55,720 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:55,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 58 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697049830] [2025-03-08 00:41:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697049830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361442750] [2025-03-08 00:41:55,899 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:55,901 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) [2025-03-08 00:41:55,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 00:41:55,954 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 00:41:55,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:41:55,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:55,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:55,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:41:55,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 77 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:56,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 77 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:56,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361442750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:56,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:56,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-08 00:41:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695539775] [2025-03-08 00:41:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:56,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 00:41:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:56,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 00:41:56,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:41:56,256 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 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) [2025-03-08 00:41:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:56,327 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2025-03-08 00:41:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:41:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 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 45 [2025-03-08 00:41:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:56,328 INFO L225 Difference]: With dead ends: 77 [2025-03-08 00:41:56,328 INFO L226 Difference]: Without dead ends: 49 [2025-03-08 00:41:56,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:41:56,329 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:56,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-08 00:41:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-08 00:41:56,336 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) [2025-03-08 00:41:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2025-03-08 00:41:56,337 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2025-03-08 00:41:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:56,337 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2025-03-08 00:41:56,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 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) [2025-03-08 00:41:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2025-03-08 00:41:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 00:41:56,338 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:56,338 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:56,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 00:41:56,538 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 [2025-03-08 00:41:56,538 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:56,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash -918647815, now seen corresponding path program 14 times [2025-03-08 00:41:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:56,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964685500] [2025-03-08 00:41:56,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:56,546 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 00:41:56,553 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:41:56,553 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:56,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 45 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964685500] [2025-03-08 00:41:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964685500] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086083462] [2025-03-08 00:41:56,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:56,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:56,968 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) [2025-03-08 00:41:56,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 00:41:57,023 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 00:41:57,044 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 00:41:57,044 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:57,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:57,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 00:41:57,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:57,193 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 23 treesize of output 1 [2025-03-08 00:41:57,591 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:41:57,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:41:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 70 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:57,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:57,986 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 20 treesize of output 18 [2025-03-08 00:41:57,988 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 20 [2025-03-08 00:41:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:41:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086083462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:58,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:58,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2025-03-08 00:41:58,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576020800] [2025-03-08 00:41:58,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:58,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 00:41:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:58,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 00:41:58,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 00:41:58,333 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) 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) [2025-03-08 00:41:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:58,658 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2025-03-08 00:41:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 00:41:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) 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 47 [2025-03-08 00:41:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:58,658 INFO L225 Difference]: With dead ends: 77 [2025-03-08 00:41:58,658 INFO L226 Difference]: Without dead ends: 50 [2025-03-08 00:41:58,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=521, Invalid=2901, Unknown=0, NotChecked=0, Total=3422 [2025-03-08 00:41:58,659 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:58,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 225 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-08 00:41:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-08 00:41:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2025-03-08 00:41:58,668 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2025-03-08 00:41:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:58,668 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2025-03-08 00:41:58,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) 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) [2025-03-08 00:41:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2025-03-08 00:41:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 00:41:58,669 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:58,669 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:58,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 00:41:58,869 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 [2025-03-08 00:41:58,869 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:58,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash 648195027, now seen corresponding path program 2 times [2025-03-08 00:41:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196809550] [2025-03-08 00:41:58,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:58,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-08 00:41:58,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:41:58,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:58,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 00:41:58,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196809550] [2025-03-08 00:41:58,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196809550] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411406485] [2025-03-08 00:41:58,990 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:58,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:58,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:58,992 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) [2025-03-08 00:41:58,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 00:41:59,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-08 00:41:59,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:41:59,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:59,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:59,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 00:41:59,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 00:41:59,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-08 00:41:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411406485] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:59,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:59,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2025-03-08 00:41:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125281091] [2025-03-08 00:41:59,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:59,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 00:41:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:59,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 00:41:59,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:41:59,362 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:59,607 INFO L93 Difference]: Finished difference Result 411 states and 436 transitions. [2025-03-08 00:41:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:41:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2025-03-08 00:41:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:59,609 INFO L225 Difference]: With dead ends: 411 [2025-03-08 00:41:59,609 INFO L226 Difference]: Without dead ends: 385 [2025-03-08 00:41:59,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:41:59,611 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 417 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:59,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 84 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2025-03-08 00:41:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 73. [2025-03-08 00:41:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2025-03-08 00:41:59,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 48 [2025-03-08 00:41:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:59,620 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2025-03-08 00:41:59,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:41:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2025-03-08 00:41:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 00:41:59,621 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:59,621 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:59,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:59,821 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 [2025-03-08 00:41:59,821 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:59,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:59,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1033238406, now seen corresponding path program 15 times [2025-03-08 00:41:59,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:59,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597739824] [2025-03-08 00:41:59,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:59,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-08 00:41:59,845 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:41:59,845 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 00:41:59,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:00,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:00,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597739824] [2025-03-08 00:42:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597739824] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:00,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603757189] [2025-03-08 00:42:00,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:00,307 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) [2025-03-08 00:42:00,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 00:42:00,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 11 equivalence classes. [2025-03-08 00:42:00,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 00:42:00,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 00:42:00,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:00,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 00:42:00,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:00,498 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 [2025-03-08 00:42:00,524 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:00,524 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 [2025-03-08 00:42:00,686 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 [2025-03-08 00:42:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:00,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:00,922 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 25 treesize of output 23 [2025-03-08 00:42:00,924 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 118 treesize of output 110 [2025-03-08 00:42:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603757189] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:01,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2025-03-08 00:42:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172531624] [2025-03-08 00:42:01,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:01,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-08 00:42:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:01,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-08 00:42:01,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 00:42:01,166 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:01,674 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2025-03-08 00:42:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 00:42:01,674 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-08 00:42:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:01,675 INFO L225 Difference]: With dead ends: 79 [2025-03-08 00:42:01,675 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 00:42:01,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=3292, Unknown=0, NotChecked=0, Total=3540 [2025-03-08 00:42:01,677 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:01,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 328 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:42:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 00:42:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2025-03-08 00:42:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2025-03-08 00:42:01,690 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 49 [2025-03-08 00:42:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:01,690 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2025-03-08 00:42:01,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2025-03-08 00:42:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 00:42:01,691 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:01,691 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:01,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 00:42:01,891 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 [2025-03-08 00:42:01,892 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:01,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 826130097, now seen corresponding path program 16 times [2025-03-08 00:42:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:01,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505093658] [2025-03-08 00:42:01,892 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:01,900 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-03-08 00:42:01,912 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:42:01,912 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:01,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:02,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:02,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505093658] [2025-03-08 00:42:02,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505093658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:02,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387367939] [2025-03-08 00:42:02,318 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:02,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:02,320 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) [2025-03-08 00:42:02,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 00:42:02,377 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-03-08 00:42:02,512 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:42:02,512 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:02,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:02,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 00:42:02,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:02,667 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 23 treesize of output 1 [2025-03-08 00:42:03,096 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:03,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 92 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:03,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:03,570 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 20 treesize of output 18 [2025-03-08 00:42:03,572 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 20 [2025-03-08 00:42:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387367939] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:03,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2025-03-08 00:42:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842956281] [2025-03-08 00:42:03,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:03,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-08 00:42:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:03,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-08 00:42:03,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=3342, Unknown=0, NotChecked=0, Total=4032 [2025-03-08 00:42:03,926 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:04,178 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2025-03-08 00:42:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:42:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 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 52 [2025-03-08 00:42:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:04,179 INFO L225 Difference]: With dead ends: 106 [2025-03-08 00:42:04,179 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 00:42:04,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=724, Invalid=3436, Unknown=0, NotChecked=0, Total=4160 [2025-03-08 00:42:04,180 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:04,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:42:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 00:42:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-03-08 00:42:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 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) [2025-03-08 00:42:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2025-03-08 00:42:04,188 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 52 [2025-03-08 00:42:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:04,189 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2025-03-08 00:42:04,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2025-03-08 00:42:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 00:42:04,189 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:04,189 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:04,389 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 [2025-03-08 00:42:04,390 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:04,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1342117168, now seen corresponding path program 17 times [2025-03-08 00:42:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:04,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426288705] [2025-03-08 00:42:04,390 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:04,397 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 12 equivalence classes. [2025-03-08 00:42:04,417 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:42:04,418 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 00:42:04,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:04,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426288705] [2025-03-08 00:42:04,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426288705] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665983043] [2025-03-08 00:42:04,858 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:04,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:04,860 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) [2025-03-08 00:42:04,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 00:42:04,931 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 12 equivalence classes. [2025-03-08 00:42:05,049 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 00:42:05,049 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 00:42:05,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:05,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-08 00:42:05,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:05,310 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 [2025-03-08 00:42:05,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:42:05,336 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 [2025-03-08 00:42:05,629 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 [2025-03-08 00:42:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:05,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:05,968 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 25 treesize of output 23 [2025-03-08 00:42:05,970 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 118 treesize of output 110 [2025-03-08 00:42:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665983043] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:06,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2025-03-08 00:42:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422751626] [2025-03-08 00:42:06,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:06,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2025-03-08 00:42:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:06,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2025-03-08 00:42:06,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4195, Unknown=0, NotChecked=0, Total=4422 [2025-03-08 00:42:06,306 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 67 states, 67 states have (on average 2.343283582089552) internal successors, (157), 67 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:06,922 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2025-03-08 00:42:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:42:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.343283582089552) internal successors, (157), 67 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-03-08 00:42:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:06,923 INFO L225 Difference]: With dead ends: 82 [2025-03-08 00:42:06,923 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 00:42:06,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=5512, Unknown=0, NotChecked=0, Total=5852 [2025-03-08 00:42:06,924 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:06,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 424 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 00:42:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2025-03-08 00:42:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2025-03-08 00:42:06,933 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 54 [2025-03-08 00:42:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:06,933 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2025-03-08 00:42:06,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.343283582089552) internal successors, (157), 67 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2025-03-08 00:42:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 00:42:06,934 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:06,934 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:06,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 00:42:07,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:07,135 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:07,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1161120613, now seen corresponding path program 18 times [2025-03-08 00:42:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351530861] [2025-03-08 00:42:07,135 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:07,142 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 12 equivalence classes. [2025-03-08 00:42:07,163 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:42:07,164 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-08 00:42:07,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 84 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351530861] [2025-03-08 00:42:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351530861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180208286] [2025-03-08 00:42:07,795 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:07,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:07,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:07,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 00:42:07,868 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 12 equivalence classes. [2025-03-08 00:42:08,153 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 00:42:08,153 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-08 00:42:08,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:08,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-08 00:42:08,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:08,366 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 23 treesize of output 1 [2025-03-08 00:42:08,953 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:08,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 112 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:08,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:09,515 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 20 treesize of output 18 [2025-03-08 00:42:09,516 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 20 [2025-03-08 00:42:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 105 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180208286] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:09,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 71 [2025-03-08 00:42:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598230279] [2025-03-08 00:42:09,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:09,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-08 00:42:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:09,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-08 00:42:09,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=4246, Unknown=0, NotChecked=0, Total=4970 [2025-03-08 00:42:09,948 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:10,429 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2025-03-08 00:42:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 00:42:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 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 57 [2025-03-08 00:42:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:10,430 INFO L225 Difference]: With dead ends: 112 [2025-03-08 00:42:10,430 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 00:42:10,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=920, Invalid=5086, Unknown=0, NotChecked=0, Total=6006 [2025-03-08 00:42:10,430 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:10,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:42:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 00:42:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-08 00:42:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 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) [2025-03-08 00:42:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2025-03-08 00:42:10,440 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 57 [2025-03-08 00:42:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:10,440 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2025-03-08 00:42:10,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2025-03-08 00:42:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-08 00:42:10,441 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:10,441 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:10,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 00:42:10,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:10,642 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:10,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1208566748, now seen corresponding path program 19 times [2025-03-08 00:42:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707863662] [2025-03-08 00:42:10,642 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:10,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 00:42:10,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 00:42:10,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:10,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:11,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:11,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707863662] [2025-03-08 00:42:11,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707863662] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:11,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91426706] [2025-03-08 00:42:11,165 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:11,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:11,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:11,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 00:42:11,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 00:42:11,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 00:42:11,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:11,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:11,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-08 00:42:11,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:11,574 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 [2025-03-08 00:42:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:42:11,604 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 [2025-03-08 00:42:11,987 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 [2025-03-08 00:42:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:12,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:12,358 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 25 treesize of output 23 [2025-03-08 00:42:12,363 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 118 treesize of output 110 [2025-03-08 00:42:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:12,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91426706] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:12,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:12,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2025-03-08 00:42:12,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97556425] [2025-03-08 00:42:12,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:12,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-08 00:42:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:12,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-08 00:42:12,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5007, Unknown=0, NotChecked=0, Total=5256 [2025-03-08 00:42:12,746 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 73 states, 73 states have (on average 2.356164383561644) internal successors, (172), 73 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:13,500 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2025-03-08 00:42:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:42:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.356164383561644) internal successors, (172), 73 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-03-08 00:42:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:13,501 INFO L225 Difference]: With dead ends: 85 [2025-03-08 00:42:13,501 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 00:42:13,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=378, Invalid=6762, Unknown=0, NotChecked=0, Total=7140 [2025-03-08 00:42:13,502 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:13,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 514 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:42:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 00:42:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2025-03-08 00:42:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2025-03-08 00:42:13,513 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 59 [2025-03-08 00:42:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:13,513 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2025-03-08 00:42:13,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.356164383561644) internal successors, (172), 73 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2025-03-08 00:42:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 00:42:13,514 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:13,514 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:13,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:13,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 00:42:13,714 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:13,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -297979889, now seen corresponding path program 20 times [2025-03-08 00:42:13,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:13,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367794823] [2025-03-08 00:42:13,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:13,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:13,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-03-08 00:42:13,732 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:42:13,732 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:13,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 108 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:14,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367794823] [2025-03-08 00:42:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367794823] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872106694] [2025-03-08 00:42:14,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:14,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:14,361 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 00:42:14,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-03-08 00:42:14,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:42:14,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:14,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:14,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-08 00:42:14,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:14,701 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 23 treesize of output 1 [2025-03-08 00:42:15,294 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:15,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 145 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:15,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:15,904 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 20 treesize of output 18 [2025-03-08 00:42:15,906 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 20 [2025-03-08 00:42:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 135 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:16,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872106694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:16,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:16,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 75 [2025-03-08 00:42:16,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539508061] [2025-03-08 00:42:16,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:16,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-03-08 00:42:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:16,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-03-08 00:42:16,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=4749, Unknown=0, NotChecked=0, Total=5550 [2025-03-08 00:42:16,382 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 75 states, 75 states have (on average 2.4) internal successors, (180), 75 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:16,808 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2025-03-08 00:42:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:42:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4) internal successors, (180), 75 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2025-03-08 00:42:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:16,809 INFO L225 Difference]: With dead ends: 118 [2025-03-08 00:42:16,809 INFO L226 Difference]: Without dead ends: 82 [2025-03-08 00:42:16,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=848, Invalid=5004, Unknown=0, NotChecked=0, Total=5852 [2025-03-08 00:42:16,810 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:16,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 324 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:42:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-08 00:42:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-08 00:42:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2025-03-08 00:42:16,819 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 62 [2025-03-08 00:42:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:16,820 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2025-03-08 00:42:16,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4) internal successors, (180), 75 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2025-03-08 00:42:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-08 00:42:16,823 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:16,823 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:16,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 00:42:17,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 00:42:17,023 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:17,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1806369134, now seen corresponding path program 21 times [2025-03-08 00:42:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:17,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855764977] [2025-03-08 00:42:17,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:17,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:17,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 14 equivalence classes. [2025-03-08 00:42:17,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 00:42:17,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-08 00:42:17,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 78 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855764977] [2025-03-08 00:42:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855764977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375375291] [2025-03-08 00:42:18,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:18,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 00:42:18,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 14 equivalence classes. [2025-03-08 00:42:18,793 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 00:42:18,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-08 00:42:18,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:18,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-08 00:42:18,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:19,069 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 [2025-03-08 00:42:19,100 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:19,101 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 [2025-03-08 00:42:19,523 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 [2025-03-08 00:42:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:19,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:20,022 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 25 treesize of output 23 [2025-03-08 00:42:20,023 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 118 treesize of output 110 [2025-03-08 00:42:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:20,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375375291] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:20,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:20,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 85 [2025-03-08 00:42:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970650721] [2025-03-08 00:42:20,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:20,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-08 00:42:20,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:20,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-08 00:42:20,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=6580, Unknown=0, NotChecked=0, Total=7140 [2025-03-08 00:42:20,470 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 85 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:22,587 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2025-03-08 00:42:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-08 00:42:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 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 64 [2025-03-08 00:42:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:22,588 INFO L225 Difference]: With dead ends: 125 [2025-03-08 00:42:22,588 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 00:42:22,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4635 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1029, Invalid=13013, Unknown=0, NotChecked=0, Total=14042 [2025-03-08 00:42:22,589 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 221 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:22,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 379 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:42:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 00:42:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2025-03-08 00:42:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.119047619047619) internal successors, (94), 84 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2025-03-08 00:42:22,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 64 [2025-03-08 00:42:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:22,603 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2025-03-08 00:42:22,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2025-03-08 00:42:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-08 00:42:22,604 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:22,604 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:22,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 00:42:22,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 00:42:22,804 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:22,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1764629698, now seen corresponding path program 22 times [2025-03-08 00:42:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:22,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683035717] [2025-03-08 00:42:22,805 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:22,822 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-08 00:42:22,840 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 00:42:22,840 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:22,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:23,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683035717] [2025-03-08 00:42:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683035717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4118054] [2025-03-08 00:42:23,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:23,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:23,448 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:23,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 00:42:23,530 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-08 00:42:23,753 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 00:42:23,753 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:23,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:23,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-08 00:42:23,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:23,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 00:42:23,829 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:23,830 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 [2025-03-08 00:42:24,174 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 [2025-03-08 00:42:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:24,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:24,615 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 25 treesize of output 23 [2025-03-08 00:42:24,617 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 118 treesize of output 110 [2025-03-08 00:42:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:25,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4118054] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:25,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2025-03-08 00:42:25,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676670617] [2025-03-08 00:42:25,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:25,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-08 00:42:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:25,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-08 00:42:25,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4750, Unknown=0, NotChecked=0, Total=4970 [2025-03-08 00:42:25,045 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:26,007 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2025-03-08 00:42:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 00:42:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2025-03-08 00:42:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:26,008 INFO L225 Difference]: With dead ends: 91 [2025-03-08 00:42:26,008 INFO L226 Difference]: Without dead ends: 89 [2025-03-08 00:42:26,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=353, Invalid=6619, Unknown=0, NotChecked=0, Total=6972 [2025-03-08 00:42:26,009 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:26,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 644 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:42:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-08 00:42:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2025-03-08 00:42:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2025-03-08 00:42:26,029 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 69 [2025-03-08 00:42:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:26,030 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2025-03-08 00:42:26,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2025-03-08 00:42:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-08 00:42:26,030 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:26,030 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:26,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-08 00:42:26,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 00:42:26,231 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:26,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 317242733, now seen corresponding path program 23 times [2025-03-08 00:42:26,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:26,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265923045] [2025-03-08 00:42:26,231 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:26,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:26,244 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 15 equivalence classes. [2025-03-08 00:42:26,288 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:42:26,289 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-08 00:42:26,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265923045] [2025-03-08 00:42:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265923045] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526937879] [2025-03-08 00:42:26,909 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:26,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:26,912 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:26,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 00:42:26,992 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 15 equivalence classes. [2025-03-08 00:42:27,150 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:42:27,150 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-08 00:42:27,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:27,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-08 00:42:27,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:27,537 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 [2025-03-08 00:42:28,091 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 [2025-03-08 00:42:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:28,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:28,652 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 18 treesize of output 16 [2025-03-08 00:42:28,653 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 24 treesize of output 20 [2025-03-08 00:42:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526937879] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:29,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 90 [2025-03-08 00:42:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469538343] [2025-03-08 00:42:29,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:29,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-03-08 00:42:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:29,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-03-08 00:42:29,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=7699, Unknown=0, NotChecked=0, Total=8010 [2025-03-08 00:42:29,189 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 90 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:30,080 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2025-03-08 00:42:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 00:42:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 90 states have internal predecessors, (211), 0 states have call successors, (0), 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 72 [2025-03-08 00:42:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:30,081 INFO L225 Difference]: With dead ends: 135 [2025-03-08 00:42:30,081 INFO L226 Difference]: Without dead ends: 133 [2025-03-08 00:42:30,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=7869, Unknown=0, NotChecked=0, Total=8190 [2025-03-08 00:42:30,082 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:30,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 970 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:42:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-03-08 00:42:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2025-03-08 00:42:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2025-03-08 00:42:30,095 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 72 [2025-03-08 00:42:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:30,095 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2025-03-08 00:42:30,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 90 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2025-03-08 00:42:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-08 00:42:30,096 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:30,096 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:30,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-08 00:42:30,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:30,296 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:30,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1659085836, now seen corresponding path program 24 times [2025-03-08 00:42:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592884335] [2025-03-08 00:42:30,297 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:30,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:30,306 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 74 statements into 16 equivalence classes. [2025-03-08 00:42:30,345 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 74 of 74 statements. [2025-03-08 00:42:30,345 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-08 00:42:30,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:31,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:31,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592884335] [2025-03-08 00:42:31,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592884335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:31,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547116353] [2025-03-08 00:42:31,082 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:31,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:31,084 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:31,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-08 00:42:31,172 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 74 statements into 16 equivalence classes. [2025-03-08 00:42:31,655 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 74 of 74 statements. [2025-03-08 00:42:31,656 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-08 00:42:31,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:31,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 85 conjuncts are in the unsatisfiable core [2025-03-08 00:42:31,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:31,728 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 [2025-03-08 00:42:31,759 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:31,759 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 [2025-03-08 00:42:32,149 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 [2025-03-08 00:42:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:32,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:32,677 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 25 treesize of output 23 [2025-03-08 00:42:32,680 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 118 treesize of output 110 [2025-03-08 00:42:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547116353] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:33,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:33,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 78 [2025-03-08 00:42:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835952603] [2025-03-08 00:42:33,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:33,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-03-08 00:42:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:33,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-03-08 00:42:33,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5757, Unknown=0, NotChecked=0, Total=6006 [2025-03-08 00:42:33,206 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 78 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:34,268 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2025-03-08 00:42:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 00:42:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 78 states have internal predecessors, (187), 0 states have call successors, (0), 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 74 [2025-03-08 00:42:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:34,269 INFO L225 Difference]: With dead ends: 133 [2025-03-08 00:42:34,269 INFO L226 Difference]: Without dead ends: 131 [2025-03-08 00:42:34,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2025-03-08 00:42:34,269 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:34,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 644 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 00:42:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-08 00:42:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2025-03-08 00:42:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2025-03-08 00:42:34,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 74 [2025-03-08 00:42:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:34,284 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2025-03-08 00:42:34,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 78 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2025-03-08 00:42:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-08 00:42:34,284 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:34,284 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:34,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:34,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:34,485 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:34,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2051080414, now seen corresponding path program 25 times [2025-03-08 00:42:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810094959] [2025-03-08 00:42:34,485 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:34,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-08 00:42:34,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:42:34,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:34,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 223 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:34,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810094959] [2025-03-08 00:42:34,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810094959] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651301649] [2025-03-08 00:42:34,860 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:34,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:34,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:34,862 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:34,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-08 00:42:34,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-08 00:42:34,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:42:34,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:34,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:34,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 00:42:34,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:35,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651301649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:35,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:35,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2025-03-08 00:42:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22944234] [2025-03-08 00:42:35,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:35,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-08 00:42:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:35,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-08 00:42:35,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 00:42:35,557 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:35,708 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2025-03-08 00:42:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 00:42:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2025-03-08 00:42:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:35,709 INFO L225 Difference]: With dead ends: 137 [2025-03-08 00:42:35,709 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 00:42:35,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 107 SyntacticMatches, 27 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 00:42:35,710 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:35,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:42:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 00:42:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-03-08 00:42:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2025-03-08 00:42:35,728 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 75 [2025-03-08 00:42:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:35,728 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2025-03-08 00:42:35,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2025-03-08 00:42:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-08 00:42:35,729 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:35,729 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:35,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:35,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-08 00:42:35,929 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:35,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash -656629281, now seen corresponding path program 26 times [2025-03-08 00:42:35,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:35,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747725234] [2025-03-08 00:42:35,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:35,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:35,938 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 77 statements into 2 equivalence classes. [2025-03-08 00:42:35,958 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:42:35,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:35,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 198 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:36,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:36,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747725234] [2025-03-08 00:42:36,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747725234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:36,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601451382] [2025-03-08 00:42:36,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:36,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:36,765 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:36,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-08 00:42:36,854 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 77 statements into 2 equivalence classes. [2025-03-08 00:42:36,884 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 77 of 77 statements. [2025-03-08 00:42:36,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:36,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:36,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-08 00:42:36,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:37,228 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 23 treesize of output 1 [2025-03-08 00:42:38,117 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:38,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 247 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:38,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:38,963 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 20 treesize of output 18 [2025-03-08 00:42:38,965 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 20 [2025-03-08 00:42:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 234 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601451382] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:39,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2025-03-08 00:42:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732156078] [2025-03-08 00:42:39,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:39,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2025-03-08 00:42:39,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:39,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2025-03-08 00:42:39,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=7356, Unknown=0, NotChecked=0, Total=8556 [2025-03-08 00:42:39,667 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 93 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:40,145 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2025-03-08 00:42:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 00:42:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 93 states have internal predecessors, (225), 0 states have call successors, (0), 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 77 [2025-03-08 00:42:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:40,146 INFO L225 Difference]: With dead ends: 136 [2025-03-08 00:42:40,146 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 00:42:40,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1256, Invalid=7674, Unknown=0, NotChecked=0, Total=8930 [2025-03-08 00:42:40,147 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:40,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 230 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 00:42:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-03-08 00:42:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2025-03-08 00:42:40,161 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 77 [2025-03-08 00:42:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:40,161 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2025-03-08 00:42:40,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 93 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2025-03-08 00:42:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-08 00:42:40,161 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:40,161 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:40,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-08 00:42:40,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:40,362 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:40,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash -15464800, now seen corresponding path program 27 times [2025-03-08 00:42:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829742815] [2025-03-08 00:42:40,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:40,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 17 equivalence classes. [2025-03-08 00:42:40,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:42:40,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-08 00:42:40,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:41,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829742815] [2025-03-08 00:42:41,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829742815] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774101636] [2025-03-08 00:42:41,212 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:41,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:41,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:41,214 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:41,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-08 00:42:41,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 17 equivalence classes. [2025-03-08 00:42:41,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 00:42:41,971 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-08 00:42:41,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:41,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-03-08 00:42:41,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:42,045 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 [2025-03-08 00:42:42,075 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:42,075 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 [2025-03-08 00:42:42,508 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 [2025-03-08 00:42:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:42,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:43,084 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 25 treesize of output 23 [2025-03-08 00:42:43,086 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 54 treesize of output 50 [2025-03-08 00:42:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774101636] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:43,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 83 [2025-03-08 00:42:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811650822] [2025-03-08 00:42:43,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:43,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2025-03-08 00:42:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:43,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2025-03-08 00:42:43,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=6541, Unknown=0, NotChecked=0, Total=6806 [2025-03-08 00:42:43,693 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:44,972 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2025-03-08 00:42:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 00:42:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-08 00:42:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:44,973 INFO L225 Difference]: With dead ends: 97 [2025-03-08 00:42:44,973 INFO L226 Difference]: Without dead ends: 95 [2025-03-08 00:42:44,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=431, Invalid=9271, Unknown=0, NotChecked=0, Total=9702 [2025-03-08 00:42:44,974 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:44,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 725 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3002 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 00:42:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-08 00:42:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2025-03-08 00:42:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.086021505376344) internal successors, (101), 93 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2025-03-08 00:42:44,989 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 79 [2025-03-08 00:42:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:44,989 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2025-03-08 00:42:44,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2025-03-08 00:42:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-08 00:42:44,989 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:44,989 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:44,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-08 00:42:45,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:45,190 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:45,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1149483317, now seen corresponding path program 28 times [2025-03-08 00:42:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549507377] [2025-03-08 00:42:45,190 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:45,199 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-08 00:42:45,225 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:42:45,225 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:45,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 273 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:46,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549507377] [2025-03-08 00:42:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549507377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135624420] [2025-03-08 00:42:46,052 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:46,054 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:46,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-08 00:42:46,151 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-08 00:42:46,484 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 00:42:46,485 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:46,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:46,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-03-08 00:42:46,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:46,783 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 23 treesize of output 1 [2025-03-08 00:42:47,626 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:47,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 287 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:47,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:48,561 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 20 treesize of output 18 [2025-03-08 00:42:48,563 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 20 [2025-03-08 00:42:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 273 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135624420] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:49,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 100 [2025-03-08 00:42:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191302833] [2025-03-08 00:42:49,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:49,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2025-03-08 00:42:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:49,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2025-03-08 00:42:49,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=8277, Unknown=0, NotChecked=0, Total=9900 [2025-03-08 00:42:49,313 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 100 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:49,738 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2025-03-08 00:42:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 00:42:49,739 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 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 82 [2025-03-08 00:42:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:49,739 INFO L225 Difference]: With dead ends: 142 [2025-03-08 00:42:49,739 INFO L226 Difference]: Without dead ends: 94 [2025-03-08 00:42:49,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4374 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1675, Invalid=8425, Unknown=0, NotChecked=0, Total=10100 [2025-03-08 00:42:49,740 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:49,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 178 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-08 00:42:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2025-03-08 00:42:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2025-03-08 00:42:49,755 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 82 [2025-03-08 00:42:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:49,755 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2025-03-08 00:42:49,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2025-03-08 00:42:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-08 00:42:49,755 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:49,755 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:49,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-08 00:42:49,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-08 00:42:49,956 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:49,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -845499734, now seen corresponding path program 29 times [2025-03-08 00:42:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:49,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39350325] [2025-03-08 00:42:49,957 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:49,966 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 18 equivalence classes. [2025-03-08 00:42:50,004 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 00:42:50,005 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-08 00:42:50,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39350325] [2025-03-08 00:42:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39350325] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698356947] [2025-03-08 00:42:50,882 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:50,884 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:50,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-08 00:42:50,993 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 18 equivalence classes. [2025-03-08 00:42:51,140 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 00:42:51,141 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-03-08 00:42:51,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:51,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-08 00:42:51,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:51,629 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 [2025-03-08 00:42:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:42:51,671 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 [2025-03-08 00:42:52,342 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 [2025-03-08 00:42:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:52,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:53,109 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 25 treesize of output 23 [2025-03-08 00:42:53,111 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 118 treesize of output 110 [2025-03-08 00:42:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698356947] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:53,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:53,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 103 [2025-03-08 00:42:53,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635173594] [2025-03-08 00:42:53,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:53,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-03-08 00:42:53,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:53,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-03-08 00:42:53,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=10153, Unknown=0, NotChecked=0, Total=10506 [2025-03-08 00:42:53,821 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 103 states, 103 states have (on average 2.3980582524271843) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:55,423 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2025-03-08 00:42:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 00:42:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.3980582524271843) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 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 84 [2025-03-08 00:42:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:55,424 INFO L225 Difference]: With dead ends: 100 [2025-03-08 00:42:55,424 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 00:42:55,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=532, Invalid=13510, Unknown=0, NotChecked=0, Total=14042 [2025-03-08 00:42:55,425 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 4242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 4244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:55,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1157 Invalid, 4244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4242 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 00:42:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 00:42:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2025-03-08 00:42:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2025-03-08 00:42:55,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 84 [2025-03-08 00:42:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:55,442 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2025-03-08 00:42:55,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.3980582524271843) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 00:42:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2025-03-08 00:42:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-08 00:42:55,443 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:55,443 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:55,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-08 00:42:55,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-08 00:42:55,643 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:55,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1701488257, now seen corresponding path program 30 times [2025-03-08 00:42:55,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909208556] [2025-03-08 00:42:55,644 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:55,653 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 87 statements into 18 equivalence classes. [2025-03-08 00:42:55,688 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 00:42:55,688 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-08 00:42:55,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 273 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909208556] [2025-03-08 00:42:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909208556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033182624] [2025-03-08 00:42:56,669 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:56,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:56,671 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:42:56,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-08 00:42:56,780 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 87 statements into 18 equivalence classes. [2025-03-08 00:42:57,142 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 00:42:57,142 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-08 00:42:57,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:57,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-08 00:42:57,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:57,550 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 23 treesize of output 1 [2025-03-08 00:42:58,663 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 00:42:58,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-08 00:42:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 330 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:42:58,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:59,694 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 20 treesize of output 18 [2025-03-08 00:42:59,696 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 20