./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.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_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:40:47,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:40:47,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:40:48,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:40:48,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:40:48,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:40:48,017 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:40:48,017 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:40:48,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:40:48,017 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:40:48,018 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:40:48,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:40:48,018 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:40:48,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:40:48,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:40:48,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:40:48,020 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:40:48,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:40:48,021 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:40:48,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:40:48,021 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 -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2025-03-08 00:40:48,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:40:48,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:40:48,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:40:48,242 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:40:48,243 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:40:48,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-08 00:40:49,391 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbd7bc16/ee35ce318eae452ba5f1b23421704562/FLAGff0e47869 [2025-03-08 00:40:49,576 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:40:49,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2025-03-08 00:40:49,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbd7bc16/ee35ce318eae452ba5f1b23421704562/FLAGff0e47869 [2025-03-08 00:40:49,618 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbd7bc16/ee35ce318eae452ba5f1b23421704562 [2025-03-08 00:40:49,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:40:49,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:40:49,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:40:49,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:40:49,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:40:49,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6400e931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49, skipping insertion in model container [2025-03-08 00:40:49,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,640 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:40:49,743 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2025-03-08 00:40:49,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:40:49,763 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:40:49,770 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_nondet_vars.c[413,426] [2025-03-08 00:40:49,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:40:49,790 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:40:49,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49 WrapperNode [2025-03-08 00:40:49,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:40:49,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:40:49,793 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:40:49,793 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:40:49,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,812 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2025-03-08 00:40:49,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:40:49,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:40:49,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:40:49,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:40:49,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,825 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,836 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 00:40:49,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,839 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,843 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:40:49,846 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:40:49,846 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:40:49,846 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:40:49,847 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (1/1) ... [2025-03-08 00:40:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:40:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:49,870 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 00:40:49,872 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 00:40:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:40:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 00:40:49,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 00:40:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:40:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:40:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:40:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:40:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:40:49,929 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:40:49,931 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:40:50,020 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-08 00:40:50,028 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-08 00:40:50,028 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:40:50,035 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:40:50,037 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:40:50,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:40:50 BoogieIcfgContainer [2025-03-08 00:40:50,037 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:40:50,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:40:50,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:40:50,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:40:50,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:40:49" (1/3) ... [2025-03-08 00:40:50,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7093ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:40:50, skipping insertion in model container [2025-03-08 00:40:50,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:40:49" (2/3) ... [2025-03-08 00:40:50,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7093ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:40:50, skipping insertion in model container [2025-03-08 00:40:50,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:40:50" (3/3) ... [2025-03-08 00:40:50,044 INFO L128 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2025-03-08 00:40:50,053 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:40:50,054 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_init_nondet_vars.c that has 2 procedures, 21 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 00:40:50,088 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:40:50,098 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;@448ee723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:40:50,099 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:40:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 00:40:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 00:40:50,105 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:50,105 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:50,106 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:50,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1966607330, now seen corresponding path program 1 times [2025-03-08 00:40:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:50,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215009684] [2025-03-08 00:40:50,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:50,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 00:40:50,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:40:50,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:50,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 00:40:50,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215009684] [2025-03-08 00:40:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215009684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843810457] [2025-03-08 00:40:50,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:50,231 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 00:40:50,232 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 00:40:50,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 00:40:50,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:40:50,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:50,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:50,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 00:40:50,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 00:40:50,313 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:40:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843810457] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:40:50,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:40:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 00:40:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783619428] [2025-03-08 00:40:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:40:50,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 00:40:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:50,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 00:40:50,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:40:50,330 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:40:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:50,341 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-03-08 00:40:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 00:40:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-08 00:40:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:50,347 INFO L225 Difference]: With dead ends: 39 [2025-03-08 00:40:50,347 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 00:40:50,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:40:50,352 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:50,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:40:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 00:40:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-08 00:40:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 00:40:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-08 00:40:50,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2025-03-08 00:40:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:50,376 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-08 00:40:50,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:40:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-08 00:40:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 00:40:50,378 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:50,378 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:50,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 00:40:50,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 00:40:50,579 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:50,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash -729355620, now seen corresponding path program 1 times [2025-03-08 00:40:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443291057] [2025-03-08 00:40:50,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:50,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 00:40:50,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:40:50,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:50,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:40:50,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:50,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443291057] [2025-03-08 00:40:50,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443291057] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:40:50,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:40:50,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:40:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68741722] [2025-03-08 00:40:50,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:40:50,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:40:50,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:50,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:40:50,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:40:50,732 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 00:40:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:50,768 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2025-03-08 00:40:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:40:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-08 00:40:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:50,769 INFO L225 Difference]: With dead ends: 32 [2025-03-08 00:40:50,770 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 00:40:50,770 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 00:40:50,770 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:50,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:40:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 00:40:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2025-03-08 00:40:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 00:40:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-08 00:40:50,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2025-03-08 00:40:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:50,779 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-08 00:40:50,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 00:40:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-08 00:40:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 00:40:50,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:50,780 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:50,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:40:50,781 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:50,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 824661310, now seen corresponding path program 1 times [2025-03-08 00:40:50,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230003627] [2025-03-08 00:40:50,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:50,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:50,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 00:40:50,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 00:40:50,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:50,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:40:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230003627] [2025-03-08 00:40:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230003627] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487467390] [2025-03-08 00:40:51,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:51,148 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 00:40:51,149 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 00:40:51,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 00:40:51,198 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 00:40:51,198 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:51,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:51,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 00:40:51,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:51,382 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 00:40:51,448 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 00:40:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:40:51,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:51,513 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 16 treesize of output 14 [2025-03-08 00:40:51,518 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 20 treesize of output 16 [2025-03-08 00:40:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:40:51,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487467390] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:51,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:51,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2025-03-08 00:40:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265903909] [2025-03-08 00:40:51,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:51,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 00:40:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:51,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 00:40:51,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-08 00:40:51,631 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:51,788 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2025-03-08 00:40:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:40:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2025-03-08 00:40:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:51,790 INFO L225 Difference]: With dead ends: 39 [2025-03-08 00:40:51,790 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 00:40:51,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:40:51,792 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:51,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 151 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:40:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 00:40:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2025-03-08 00:40:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:40:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-03-08 00:40:51,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 25 [2025-03-08 00:40:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:51,799 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-03-08 00:40:51,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 00:40:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-03-08 00:40:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 00:40:51,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:51,800 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:51,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:40:52,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-08 00:40:52,001 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:52,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash 273025901, now seen corresponding path program 1 times [2025-03-08 00:40:52,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:52,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945404303] [2025-03-08 00:40:52,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:52,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 00:40:52,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:40:52,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:52,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:52,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945404303] [2025-03-08 00:40:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945404303] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062012693] [2025-03-08 00:40:52,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:40:52,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:52,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:52,063 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 00:40:52,064 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 00:40:52,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 00:40:52,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:40:52,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:40:52,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:52,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:40:52,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:52,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:52,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062012693] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:52,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-08 00:40:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878519639] [2025-03-08 00:40:52,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:52,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 00:40:52,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:52,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 00:40:52,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-08 00:40:52,196 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 00:40:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:40:52,236 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2025-03-08 00:40:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:40:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2025-03-08 00:40:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:40:52,237 INFO L225 Difference]: With dead ends: 43 [2025-03-08 00:40:52,237 INFO L226 Difference]: Without dead ends: 34 [2025-03-08 00:40:52,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:40:52,238 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:40:52,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:40:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-08 00:40:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2025-03-08 00:40:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:40:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-08 00:40:52,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2025-03-08 00:40:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:40:52,241 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-08 00:40:52,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 00:40:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-08 00:40:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 00:40:52,242 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:40:52,242 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:40:52,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:40:52,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:52,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:40:52,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:40:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1503268956, now seen corresponding path program 2 times [2025-03-08 00:40:52,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:40:52,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61733216] [2025-03-08 00:40:52,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:40:52,449 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:40:52,473 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:40:52,473 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:52,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:52,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:40:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61733216] [2025-03-08 00:40:52,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61733216] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:40:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39266942] [2025-03-08 00:40:52,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:40:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:40:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:40:52,774 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 00:40:52,775 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 00:40:52,798 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:40:52,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:40:52,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:40:52,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:40:52,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 00:40:52,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:40:52,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 00:40:52,975 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 23 treesize of output 11 [2025-03-08 00:40:53,024 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 00:40:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 00:40:53,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:40:53,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:40:53,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2025-03-08 00:40:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:40:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39266942] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:40:53,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:40:53,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2025-03-08 00:40:53,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509722188] [2025-03-08 00:40:53,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:40:53,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 00:40:53,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:40:53,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 00:40:53,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:40:53,196 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-08 00:40:57,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:01,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:01,445 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2025-03-08 00:41:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:41:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2025-03-08 00:41:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:01,450 INFO L225 Difference]: With dead ends: 59 [2025-03-08 00:41:01,451 INFO L226 Difference]: Without dead ends: 57 [2025-03-08 00:41:01,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:41:01,452 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:01,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 188 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-03-08 00:41:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-08 00:41:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2025-03-08 00:41:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2025-03-08 00:41:01,458 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 32 [2025-03-08 00:41:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:01,458 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2025-03-08 00:41:01,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-08 00:41:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2025-03-08 00:41:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 00:41:01,459 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:01,459 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:01,465 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 00:41:01,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:01,663 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:01,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 262345615, now seen corresponding path program 2 times [2025-03-08 00:41:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535628424] [2025-03-08 00:41:01,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:01,673 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-08 00:41:01,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 00:41:01,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:01,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:41:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535628424] [2025-03-08 00:41:01,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535628424] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335503614] [2025-03-08 00:41:01,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:01,965 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 00:41:01,967 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 00:41:01,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-08 00:41:02,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 00:41:02,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:02,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:02,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-08 00:41:02,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:02,152 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 00:41:02,226 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 00:41:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 00:41:02,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:02,301 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 16 treesize of output 14 [2025-03-08 00:41:02,304 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 20 treesize of output 16 [2025-03-08 00:41:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:41:02,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335503614] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:02,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:02,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2025-03-08 00:41:02,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410456640] [2025-03-08 00:41:02,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:02,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 00:41:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:02,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 00:41:02,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:41:02,493 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-08 00:41:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:02,859 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2025-03-08 00:41:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:41:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 35 [2025-03-08 00:41:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:02,860 INFO L225 Difference]: With dead ends: 59 [2025-03-08 00:41:02,860 INFO L226 Difference]: Without dead ends: 57 [2025-03-08 00:41:02,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:41:02,861 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:02,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 206 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-08 00:41:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2025-03-08 00:41:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2025-03-08 00:41:02,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 35 [2025-03-08 00:41:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:02,875 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2025-03-08 00:41:02,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-08 00:41:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2025-03-08 00:41:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 00:41:02,875 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:02,876 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:03,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:03,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:03,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1391788333, now seen corresponding path program 3 times [2025-03-08 00:41:03,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:03,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930419805] [2025-03-08 00:41:03,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:03,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-03-08 00:41:03,098 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:41:03,098 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:41:03,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:41:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930419805] [2025-03-08 00:41:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930419805] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050095703] [2025-03-08 00:41:03,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:03,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:03,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:03,411 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 00:41:03,413 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 00:41:03,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 5 equivalence classes. [2025-03-08 00:41:03,454 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 00:41:03,454 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:41:03,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:03,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 00:41:03,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:03,509 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 19 treesize of output 1 [2025-03-08 00:41:03,576 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:03,577 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 00:41:03,608 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 00:41:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 00:41:03,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050095703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:03,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 00:41:03,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2025-03-08 00:41:03,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381584587] [2025-03-08 00:41:03,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:03,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:41:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:03,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:41:03,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:41:03,706 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 00:41:07,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:07,923 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2025-03-08 00:41:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:41:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2025-03-08 00:41:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:07,924 INFO L225 Difference]: With dead ends: 64 [2025-03-08 00:41:07,924 INFO L226 Difference]: Without dead ends: 62 [2025-03-08 00:41:07,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-03-08 00:41:07,925 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:07,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 154 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2025-03-08 00:41:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-08 00:41:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2025-03-08 00:41:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2025-03-08 00:41:07,938 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 42 [2025-03-08 00:41:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:07,938 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2025-03-08 00:41:07,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 00:41:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2025-03-08 00:41:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 00:41:07,939 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:07,939 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:07,947 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 00:41:08,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:08,140 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:08,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash -984426852, now seen corresponding path program 4 times [2025-03-08 00:41:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389272373] [2025-03-08 00:41:08,140 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:08,146 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:41:08,151 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 44 statements. [2025-03-08 00:41:08,151 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:41:08,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 00:41:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389272373] [2025-03-08 00:41:08,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389272373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233291166] [2025-03-08 00:41:08,212 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:08,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:08,214 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 00:41:08,216 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 00:41:08,246 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:41:08,257 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 44 statements. [2025-03-08 00:41:08,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 00:41:08,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:08,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:41:08,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-08 00:41:08,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-08 00:41:08,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233291166] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:08,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:08,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 13 [2025-03-08 00:41:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003294909] [2025-03-08 00:41:08,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:08,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:41:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:08,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:41:08,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:41:08,357 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 00:41:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:08,420 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2025-03-08 00:41:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:41:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2025-03-08 00:41:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:08,421 INFO L225 Difference]: With dead ends: 72 [2025-03-08 00:41:08,421 INFO L226 Difference]: Without dead ends: 56 [2025-03-08 00:41:08,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:41:08,422 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:08,422 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-08 00:41:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2025-03-08 00:41:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2025-03-08 00:41:08,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 44 [2025-03-08 00:41:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:08,432 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2025-03-08 00:41:08,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 00:41:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2025-03-08 00:41:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 00:41:08,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:08,434 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:08,440 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 00:41:08,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:08,635 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:08,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -847174370, now seen corresponding path program 5 times [2025-03-08 00:41:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837993748] [2025-03-08 00:41:08,636 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:08,641 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-03-08 00:41:08,648 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:41:08,648 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:41:08,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:41:08,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837993748] [2025-03-08 00:41:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837993748] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693869404] [2025-03-08 00:41:08,937 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:08,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:08,939 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 00:41:08,941 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 00:41:08,972 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-03-08 00:41:08,987 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 00:41:08,987 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:41:08,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:08,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-08 00:41:08,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:09,176 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 00:41:09,272 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 00:41:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:41:09,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:09,377 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 16 treesize of output 14 [2025-03-08 00:41:09,380 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 20 treesize of output 16 [2025-03-08 00:41:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:41:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693869404] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:09,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:09,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2025-03-08 00:41:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743948471] [2025-03-08 00:41:09,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:09,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 00:41:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:09,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 00:41:09,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 00:41:09,558 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 00:41:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:09,831 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2025-03-08 00:41:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:41:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 45 [2025-03-08 00:41:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:09,833 INFO L225 Difference]: With dead ends: 71 [2025-03-08 00:41:09,834 INFO L226 Difference]: Without dead ends: 69 [2025-03-08 00:41:09,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:41:09,835 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:09,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:41:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-08 00:41:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2025-03-08 00:41:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2025-03-08 00:41:09,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 45 [2025-03-08 00:41:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:09,843 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2025-03-08 00:41:09,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 00:41:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2025-03-08 00:41:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 00:41:09,844 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:09,844 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:09,850 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 00:41:10,045 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,SelfDestructingSolverStorable8 [2025-03-08 00:41:10,046 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:10,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash 475538972, now seen corresponding path program 3 times [2025-03-08 00:41:10,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:10,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007284113] [2025-03-08 00:41:10,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:10,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-03-08 00:41:10,066 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:41:10,069 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:41:10,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:41:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007284113] [2025-03-08 00:41:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007284113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182066041] [2025-03-08 00:41:10,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:10,376 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 00:41:10,378 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 00:41:10,407 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 6 equivalence classes. [2025-03-08 00:41:10,427 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 00:41:10,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:41:10,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:10,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 00:41:10,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:10,494 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 00:41:10,540 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:10,541 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 00:41:10,597 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:10,597 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 00:41:10,683 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:41:10,683 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 00:41:10,701 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 00:41:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 00:41:10,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:10,836 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 00:41:10,840 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 00:41:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 00:41:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182066041] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:10,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 21 [2025-03-08 00:41:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063924876] [2025-03-08 00:41:10,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:10,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:41:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:10,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:41:10,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:41:10,915 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-08 00:41:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:11,145 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2025-03-08 00:41:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:41:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 46 [2025-03-08 00:41:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:11,147 INFO L225 Difference]: With dead ends: 62 [2025-03-08 00:41:11,147 INFO L226 Difference]: Without dead ends: 60 [2025-03-08 00:41:11,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:41:11,148 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:11,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 150 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-08 00:41:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2025-03-08 00:41:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2025-03-08 00:41:11,157 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2025-03-08 00:41:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:11,157 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2025-03-08 00:41:11,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-08 00:41:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2025-03-08 00:41:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 00:41:11,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:11,159 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:11,165 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 00:41:11,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 00:41:11,359 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:11,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash -942952563, now seen corresponding path program 6 times [2025-03-08 00:41:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:11,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092759568] [2025-03-08 00:41:11,361 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:11,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:11,382 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-03-08 00:41:11,398 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:41:11,398 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:41:11,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:41:11,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:11,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092759568] [2025-03-08 00:41:11,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092759568] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:11,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129671235] [2025-03-08 00:41:11,478 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:11,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:11,480 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 00:41:11,481 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 00:41:11,517 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 5 equivalence classes. [2025-03-08 00:41:11,539 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 00:41:11,539 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 00:41:11,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:11,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:41:11,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:41:11,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 00:41:11,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129671235] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:11,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:11,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2025-03-08 00:41:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811110010] [2025-03-08 00:41:11,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:11,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 00:41:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:11,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 00:41:11,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:41:11,673 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 00:41:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:11,750 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2025-03-08 00:41:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:41:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2025-03-08 00:41:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:11,751 INFO L225 Difference]: With dead ends: 73 [2025-03-08 00:41:11,751 INFO L226 Difference]: Without dead ends: 58 [2025-03-08 00:41:11,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-08 00:41:11,752 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:11,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-08 00:41:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2025-03-08 00:41:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2025-03-08 00:41:11,760 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 48 [2025-03-08 00:41:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:11,761 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2025-03-08 00:41:11,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 00:41:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2025-03-08 00:41:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 00:41:11,761 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:11,761 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:11,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 00:41:11,967 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,SelfDestructingSolverStorable10 [2025-03-08 00:41:11,967 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:11,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2117412156, now seen corresponding path program 7 times [2025-03-08 00:41:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:11,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503649436] [2025-03-08 00:41:11,969 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:11,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:11,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 00:41:11,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:41:11,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:11,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:41:12,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:12,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503649436] [2025-03-08 00:41:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503649436] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:12,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9139590] [2025-03-08 00:41:12,313 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:12,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:12,315 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 00:41:12,317 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 00:41:12,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 00:41:12,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 00:41:12,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:12,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:12,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 00:41:12,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:12,503 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 00:41:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:12,581 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 00:41:12,634 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 00:41:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 00:41:12,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:12,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9139590] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:12,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 00:41:12,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2025-03-08 00:41:12,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467119444] [2025-03-08 00:41:12,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:12,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:41:12,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:12,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:41:12,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2025-03-08 00:41:12,752 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-08 00:41:16,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:20,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:21,007 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2025-03-08 00:41:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:41:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 52 [2025-03-08 00:41:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:21,008 INFO L225 Difference]: With dead ends: 56 [2025-03-08 00:41:21,008 INFO L226 Difference]: Without dead ends: 54 [2025-03-08 00:41:21,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 00:41:21,009 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:21,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2025-03-08 00:41:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-08 00:41:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2025-03-08 00:41:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 00:41:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2025-03-08 00:41:21,016 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 52 [2025-03-08 00:41:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:21,017 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2025-03-08 00:41:21,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-08 00:41:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2025-03-08 00:41:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 00:41:21,017 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:21,017 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:21,024 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 00:41:21,219 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,SelfDestructingSolverStorable11 [2025-03-08 00:41:21,219 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:21,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -358264145, now seen corresponding path program 8 times [2025-03-08 00:41:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187210707] [2025-03-08 00:41:21,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:21,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-08 00:41:21,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:41:21,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:21,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:41:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187210707] [2025-03-08 00:41:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187210707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477135024] [2025-03-08 00:41:21,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:21,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:21,528 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 00:41:21,528 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 00:41:21,564 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-08 00:41:21,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 00:41:21,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:21,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:21,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 00:41:21,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:21,835 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 00:41:21,964 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 00:41:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-08 00:41:21,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:22,069 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 16 treesize of output 14 [2025-03-08 00:41:22,072 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 20 treesize of output 16 [2025-03-08 00:41:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:41:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477135024] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:22,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 39 [2025-03-08 00:41:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262000179] [2025-03-08 00:41:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:22,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-08 00:41:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:22,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-08 00:41:22,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:41:22,291 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2025-03-08 00:41:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:22,815 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2025-03-08 00:41:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:41:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) Word has length 55 [2025-03-08 00:41:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:22,817 INFO L225 Difference]: With dead ends: 83 [2025-03-08 00:41:22,817 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 00:41:22,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 00:41:22,818 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:22,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 317 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 00:41:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2025-03-08 00:41:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2025-03-08 00:41:22,829 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 55 [2025-03-08 00:41:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:22,829 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2025-03-08 00:41:22,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2025-03-08 00:41:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2025-03-08 00:41:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 00:41:22,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:22,833 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:22,838 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 00:41:23,036 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,SelfDestructingSolverStorable12 [2025-03-08 00:41:23,036 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:23,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash -52540324, now seen corresponding path program 9 times [2025-03-08 00:41:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:23,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626052872] [2025-03-08 00:41:23,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:23,041 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 6 equivalence classes. [2025-03-08 00:41:23,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:41:23,055 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:41:23,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 00:41:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626052872] [2025-03-08 00:41:23,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626052872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520210497] [2025-03-08 00:41:23,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:23,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:23,153 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 00:41:23,154 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 00:41:23,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 6 equivalence classes. [2025-03-08 00:41:23,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 00:41:23,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 00:41:23,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:23,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:41:23,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 00:41:23,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 00:41:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520210497] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:23,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:23,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2025-03-08 00:41:23,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945988727] [2025-03-08 00:41:23,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:23,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:41:23,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:23,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:41:23,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:41:23,369 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 00:41:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:23,438 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2025-03-08 00:41:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 00:41:23,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2025-03-08 00:41:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:23,439 INFO L225 Difference]: With dead ends: 82 [2025-03-08 00:41:23,439 INFO L226 Difference]: Without dead ends: 64 [2025-03-08 00:41:23,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:41:23,440 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:23,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:41:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-08 00:41:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2025-03-08 00:41:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:41:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2025-03-08 00:41:23,447 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 58 [2025-03-08 00:41:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:23,447 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2025-03-08 00:41:23,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 00:41:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2025-03-08 00:41:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 00:41:23,448 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:23,448 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:23,455 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 00:41:23,649 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,SelfDestructingSolverStorable13 [2025-03-08 00:41:23,649 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:23,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1121565363, now seen corresponding path program 10 times [2025-03-08 00:41:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:23,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618002634] [2025-03-08 00:41:23,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:23,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:23,654 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-08 00:41:23,662 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:41:23,662 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:23,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:41:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:23,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618002634] [2025-03-08 00:41:23,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618002634] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:23,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635032658] [2025-03-08 00:41:23,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:41:23,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:23,967 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 00:41:23,969 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 00:41:24,005 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-08 00:41:24,021 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 00:41:24,022 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:41:24,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:24,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 00:41:24,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:24,201 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 00:41:24,266 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 23 treesize of output 11 [2025-03-08 00:41:24,413 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 00:41:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 00:41:24,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:24,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:41:24,531 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 25 treesize of output 21 [2025-03-08 00:41:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:41:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635032658] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:24,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 35 [2025-03-08 00:41:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916294236] [2025-03-08 00:41:24,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:24,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-08 00:41:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:24,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-08 00:41:24,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 00:41:24,608 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-08 00:41:28,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:32,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:36,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:41,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:41,042 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2025-03-08 00:41:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:41:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 62 [2025-03-08 00:41:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:41,043 INFO L225 Difference]: With dead ends: 98 [2025-03-08 00:41:41,043 INFO L226 Difference]: Without dead ends: 96 [2025-03-08 00:41:41,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 00:41:41,044 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:41,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 412 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 725 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2025-03-08 00:41:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-08 00:41:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2025-03-08 00:41:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:41:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2025-03-08 00:41:41,052 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 62 [2025-03-08 00:41:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:41,053 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2025-03-08 00:41:41,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2025-03-08 00:41:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2025-03-08 00:41:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-08 00:41:41,054 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:41,054 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:41,061 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 00:41:41,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:41,254 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:41,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2002260738, now seen corresponding path program 11 times [2025-03-08 00:41:41,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:41,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300301806] [2025-03-08 00:41:41,255 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:41,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:41,261 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 7 equivalence classes. [2025-03-08 00:41:41,283 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 00:41:41,283 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-08 00:41:41,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-08 00:41:41,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:41,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300301806] [2025-03-08 00:41:41,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300301806] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:41,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633295596] [2025-03-08 00:41:41,614 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:41:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:41,617 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 00:41:41,617 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 00:41:41,657 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 7 equivalence classes. [2025-03-08 00:41:41,680 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 65 of 65 statements. [2025-03-08 00:41:41,680 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-08 00:41:41,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:41,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 00:41:41,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:41,910 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 00:41:42,085 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 00:41:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:41:42,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:42,210 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 16 treesize of output 14 [2025-03-08 00:41:42,212 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 20 treesize of output 16 [2025-03-08 00:41:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:41:42,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633295596] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:42,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:42,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 39 [2025-03-08 00:41:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655704472] [2025-03-08 00:41:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:42,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-08 00:41:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:42,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-08 00:41:42,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 00:41:42,319 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-08 00:41:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:42,763 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2025-03-08 00:41:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 00:41:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 65 [2025-03-08 00:41:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:42,764 INFO L225 Difference]: With dead ends: 111 [2025-03-08 00:41:42,764 INFO L226 Difference]: Without dead ends: 109 [2025-03-08 00:41:42,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:41:42,766 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:42,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 443 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-08 00:41:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2025-03-08 00:41:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:41:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2025-03-08 00:41:42,773 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 65 [2025-03-08 00:41:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:42,774 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2025-03-08 00:41:42,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-08 00:41:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2025-03-08 00:41:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-08 00:41:42,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:42,774 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:42,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 00:41:42,974 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,SelfDestructingSolverStorable15 [2025-03-08 00:41:42,975 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:42,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -842966099, now seen corresponding path program 12 times [2025-03-08 00:41:42,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:42,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742628473] [2025-03-08 00:41:42,975 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:42,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:42,980 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 7 equivalence classes. [2025-03-08 00:41:42,989 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:41:42,989 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 00:41:42,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:41:43,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742628473] [2025-03-08 00:41:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742628473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403760802] [2025-03-08 00:41:43,096 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:41:43,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:43,098 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 00:41:43,104 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 00:41:43,143 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 7 equivalence classes. [2025-03-08 00:41:43,202 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 00:41:43,202 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 00:41:43,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:43,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:41:43,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:41:43,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:41:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403760802] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:43,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-08 00:41:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473189917] [2025-03-08 00:41:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:43,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 00:41:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:43,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 00:41:43,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:41:43,405 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-08 00:41:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:43,501 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2025-03-08 00:41:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:41:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2025-03-08 00:41:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:43,502 INFO L225 Difference]: With dead ends: 110 [2025-03-08 00:41:43,502 INFO L226 Difference]: Without dead ends: 89 [2025-03-08 00:41:43,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:41:43,503 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:43,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 101 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:41:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-08 00:41:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2025-03-08 00:41:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:41:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2025-03-08 00:41:43,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 68 [2025-03-08 00:41:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:43,511 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2025-03-08 00:41:43,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-08 00:41:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2025-03-08 00:41:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-08 00:41:43,511 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:43,511 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:43,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 00:41:43,716 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,SelfDestructingSolverStorable16 [2025-03-08 00:41:43,716 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:43,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1363718684, now seen corresponding path program 13 times [2025-03-08 00:41:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72374966] [2025-03-08 00:41:43,716 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:43,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-08 00:41:43,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:41:43,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:43,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 00:41:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72374966] [2025-03-08 00:41:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72374966] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016857168] [2025-03-08 00:41:44,063 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:41:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:44,065 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 00:41:44,066 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 00:41:44,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-08 00:41:44,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-08 00:41:44,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:41:44,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:44,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-08 00:41:44,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:44,337 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 00:41:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:44,405 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 00:41:44,573 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 00:41:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-08 00:41:44,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:44,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016857168] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:44,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 00:41:44,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2025-03-08 00:41:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998145191] [2025-03-08 00:41:44,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:44,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 00:41:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:44,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 00:41:44,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 00:41:44,719 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-03-08 00:41:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:45,097 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2025-03-08 00:41:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:41:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 72 [2025-03-08 00:41:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:45,098 INFO L225 Difference]: With dead ends: 92 [2025-03-08 00:41:45,098 INFO L226 Difference]: Without dead ends: 90 [2025-03-08 00:41:45,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 00:41:45,099 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:45,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 321 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:41:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-08 00:41:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2025-03-08 00:41:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:41:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2025-03-08 00:41:45,108 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 72 [2025-03-08 00:41:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:45,108 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2025-03-08 00:41:45,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2025-03-08 00:41:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2025-03-08 00:41:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-08 00:41:45,108 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:45,108 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:45,114 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 00:41:45,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 00:41:45,309 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:45,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 448534991, now seen corresponding path program 14 times [2025-03-08 00:41:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609881923] [2025-03-08 00:41:45,309 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:45,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-08 00:41:45,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:41:45,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:45,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 39 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 00:41:45,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:45,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609881923] [2025-03-08 00:41:45,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609881923] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:45,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523797378] [2025-03-08 00:41:45,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:41:45,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:45,687 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 00:41:45,688 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 00:41:45,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-08 00:41:45,750 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 00:41:45,750 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:41:45,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:45,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 00:41:45,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:45,943 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 00:41:46,150 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 00:41:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 00:41:46,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:46,348 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 16 treesize of output 14 [2025-03-08 00:41:46,349 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 20 treesize of output 16 [2025-03-08 00:41:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 00:41:46,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523797378] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:46,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:46,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2025-03-08 00:41:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422562966] [2025-03-08 00:41:46,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:46,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-08 00:41:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:46,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-08 00:41:46,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 00:41:46,592 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-08 00:41:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:41:47,205 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2025-03-08 00:41:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 00:41:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 75 [2025-03-08 00:41:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:41:47,206 INFO L225 Difference]: With dead ends: 114 [2025-03-08 00:41:47,206 INFO L226 Difference]: Without dead ends: 85 [2025-03-08 00:41:47,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=634, Invalid=3398, Unknown=0, NotChecked=0, Total=4032 [2025-03-08 00:41:47,207 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:41:47,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 378 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:41:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-08 00:41:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2025-03-08 00:41:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:41:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2025-03-08 00:41:47,214 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 75 [2025-03-08 00:41:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:41:47,215 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2025-03-08 00:41:47,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 45 states have internal predecessors, (104), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2025-03-08 00:41:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2025-03-08 00:41:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-08 00:41:47,215 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:41:47,215 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:41:47,221 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 00:41:47,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:47,416 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:41:47,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:41:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1718078221, now seen corresponding path program 15 times [2025-03-08 00:41:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:41:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578335497] [2025-03-08 00:41:47,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:47,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:41:47,422 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 9 equivalence classes. [2025-03-08 00:41:47,437 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 76 of 76 statements. [2025-03-08 00:41:47,437 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 00:41:47,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 109 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:41:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:41:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578335497] [2025-03-08 00:41:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578335497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:41:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139077415] [2025-03-08 00:41:47,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:41:47,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:41:47,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:41:47,830 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 00:41:47,831 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 00:41:47,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 9 equivalence classes. [2025-03-08 00:41:47,935 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 76 of 76 statements. [2025-03-08 00:41:47,935 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 00:41:47,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:41:47,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 00:41:47,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:41:48,109 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 00:41:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:48,172 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 00:41:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:48,241 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 00:41:48,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:41:48,310 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 00:41:48,448 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 00:41:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 78 proven. 103 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 00:41:48,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:41:48,612 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 00:41:48,615 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 00:41:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 109 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-08 00:41:48,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139077415] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:41:48,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:41:48,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18] total 38 [2025-03-08 00:41:48,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515497120] [2025-03-08 00:41:48,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:41:48,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-08 00:41:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:41:48,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-08 00:41:48,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 00:41:48,699 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:41:52,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:41:56,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:42:00,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 00:42:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:01,135 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2025-03-08 00:42:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 00:42:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 76 [2025-03-08 00:42:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:01,137 INFO L225 Difference]: With dead ends: 84 [2025-03-08 00:42:01,137 INFO L226 Difference]: Without dead ends: 82 [2025-03-08 00:42:01,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:42:01,137 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:01,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 391 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 770 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2025-03-08 00:42:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-08 00:42:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2025-03-08 00:42:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:42:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2025-03-08 00:42:01,148 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 76 [2025-03-08 00:42:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:01,148 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2025-03-08 00:42:01,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 34 states have internal predecessors, (77), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:42:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2025-03-08 00:42:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-08 00:42:01,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:01,149 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:01,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 00:42:01,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:01,350 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:01,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash 196579693, now seen corresponding path program 16 times [2025-03-08 00:42:01,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:01,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707638092] [2025-03-08 00:42:01,350 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:01,356 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-08 00:42:01,364 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 00:42:01,364 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:01,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:42:01,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707638092] [2025-03-08 00:42:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707638092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064544796] [2025-03-08 00:42:01,740 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:01,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:01,743 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 00:42:01,744 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 00:42:01,798 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-08 00:42:01,825 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 00:42:01,825 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:01,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:01,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 00:42:01,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:02,099 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 00:42:02,168 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 23 treesize of output 11 [2025-03-08 00:42:02,382 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 00:42:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 00:42:02,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:02,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:42:02,548 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 25 treesize of output 21 [2025-03-08 00:42:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:42:02,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064544796] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:02,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:02,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 43 [2025-03-08 00:42:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899879712] [2025-03-08 00:42:02,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:02,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 00:42:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:02,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 00:42:02,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 00:42:02,648 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:42:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:03,254 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2025-03-08 00:42:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:42:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 82 [2025-03-08 00:42:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:03,255 INFO L225 Difference]: With dead ends: 132 [2025-03-08 00:42:03,255 INFO L226 Difference]: Without dead ends: 130 [2025-03-08 00:42:03,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=2739, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 00:42:03,256 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:03,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 567 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-08 00:42:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2025-03-08 00:42:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2025-03-08 00:42:03,266 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 82 [2025-03-08 00:42:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:03,267 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2025-03-08 00:42:03,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:42:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2025-03-08 00:42:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-08 00:42:03,267 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:03,268 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:03,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:03,470 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,SelfDestructingSolverStorable20 [2025-03-08 00:42:03,471 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:03,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2028884770, now seen corresponding path program 17 times [2025-03-08 00:42:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:03,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446634591] [2025-03-08 00:42:03,471 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:03,477 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 85 statements into 9 equivalence classes. [2025-03-08 00:42:03,492 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:42:03,492 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:42:03,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:42:03,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:03,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446634591] [2025-03-08 00:42:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446634591] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:03,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461011623] [2025-03-08 00:42:03,853 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:03,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:03,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:03,855 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 00:42:03,856 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 00:42:03,908 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 85 statements into 9 equivalence classes. [2025-03-08 00:42:03,939 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 00:42:03,939 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 00:42:03,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:03,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 00:42:03,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:04,275 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 00:42:04,509 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 00:42:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:42:04,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:04,674 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 16 treesize of output 14 [2025-03-08 00:42:04,675 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 20 treesize of output 16 [2025-03-08 00:42:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-08 00:42:04,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461011623] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:04,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 44 [2025-03-08 00:42:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739350813] [2025-03-08 00:42:04,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:04,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 00:42:04,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:04,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 00:42:04,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:42:04,782 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:42:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:05,303 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2025-03-08 00:42:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:42:05,304 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 85 [2025-03-08 00:42:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:05,305 INFO L225 Difference]: With dead ends: 146 [2025-03-08 00:42:05,305 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 00:42:05,305 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 140 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2025-03-08 00:42:05,306 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 131 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:05,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 509 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 00:42:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 96. [2025-03-08 00:42:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2025-03-08 00:42:05,317 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2025-03-08 00:42:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:05,317 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2025-03-08 00:42:05,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2025-03-08 00:42:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2025-03-08 00:42:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-08 00:42:05,318 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:05,318 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:05,324 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 00:42:05,523 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,SelfDestructingSolverStorable21 [2025-03-08 00:42:05,523 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:05,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 569446349, now seen corresponding path program 18 times [2025-03-08 00:42:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081172873] [2025-03-08 00:42:05,523 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:05,529 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 88 statements into 9 equivalence classes. [2025-03-08 00:42:05,549 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 88 of 88 statements. [2025-03-08 00:42:05,549 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 00:42:05,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-08 00:42:05,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081172873] [2025-03-08 00:42:05,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081172873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512736522] [2025-03-08 00:42:05,726 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:05,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:05,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:05,728 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 00:42:05,729 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 00:42:05,786 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 88 statements into 9 equivalence classes. [2025-03-08 00:42:05,872 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 88 of 88 statements. [2025-03-08 00:42:05,872 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 00:42:05,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:05,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 00:42:05,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-08 00:42:06,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2025-03-08 00:42:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512736522] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:06,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:06,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2025-03-08 00:42:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893914544] [2025-03-08 00:42:06,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:06,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 00:42:06,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:06,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 00:42:06,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:42:06,168 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-08 00:42:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:06,281 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2025-03-08 00:42:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 00:42:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 88 [2025-03-08 00:42:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:06,282 INFO L225 Difference]: With dead ends: 150 [2025-03-08 00:42:06,282 INFO L226 Difference]: Without dead ends: 123 [2025-03-08 00:42:06,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 00:42:06,283 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:06,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:42:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-08 00:42:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2025-03-08 00:42:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2025-03-08 00:42:06,293 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 88 [2025-03-08 00:42:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:06,293 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2025-03-08 00:42:06,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-03-08 00:42:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2025-03-08 00:42:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-08 00:42:06,294 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:06,294 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:06,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-08 00:42:06,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:06,494 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:06,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash -292899076, now seen corresponding path program 19 times [2025-03-08 00:42:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:06,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418835548] [2025-03-08 00:42:06,495 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:06,501 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-08 00:42:06,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 00:42:06,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:06,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418835548] [2025-03-08 00:42:06,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418835548] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688074269] [2025-03-08 00:42:06,959 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:06,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:06,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:06,961 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 00:42:06,962 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 00:42:07,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-08 00:42:07,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 00:42:07,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:07,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:07,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-08 00:42:07,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:07,354 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 00:42:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:42:07,461 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 00:42:07,724 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 00:42:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 60 proven. 179 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 00:42:07,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:07,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:42:07,880 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 25 treesize of output 21 [2025-03-08 00:42:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688074269] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:08,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:08,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 23] total 48 [2025-03-08 00:42:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51554127] [2025-03-08 00:42:08,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:08,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 00:42:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:08,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 00:42:08,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 00:42:08,030 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2025-03-08 00:42:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:08,612 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2025-03-08 00:42:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 00:42:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) Word has length 92 [2025-03-08 00:42:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:08,613 INFO L225 Difference]: With dead ends: 118 [2025-03-08 00:42:08,613 INFO L226 Difference]: Without dead ends: 116 [2025-03-08 00:42:08,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 152 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=3096, Unknown=0, NotChecked=0, Total=3422 [2025-03-08 00:42:08,614 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:08,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 533 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-08 00:42:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2025-03-08 00:42:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2025-03-08 00:42:08,628 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 92 [2025-03-08 00:42:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:08,628 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2025-03-08 00:42:08,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2025-03-08 00:42:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2025-03-08 00:42:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 00:42:08,629 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:08,629 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:08,635 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 00:42:08,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:08,831 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:08,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1618045167, now seen corresponding path program 20 times [2025-03-08 00:42:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:08,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369634017] [2025-03-08 00:42:08,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:08,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-08 00:42:08,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:42:08,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:08,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 72 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369634017] [2025-03-08 00:42:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369634017] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839253499] [2025-03-08 00:42:09,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:09,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:09,334 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 00:42:09,335 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 00:42:09,389 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-08 00:42:09,411 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 00:42:09,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:09,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:09,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-08 00:42:09,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:09,656 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 00:42:09,920 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 00:42:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:09,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:10,229 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 16 treesize of output 14 [2025-03-08 00:42:10,231 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 20 treesize of output 16 [2025-03-08 00:42:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:10,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839253499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:10,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:10,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2025-03-08 00:42:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145948069] [2025-03-08 00:42:10,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:10,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-03-08 00:42:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:10,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-03-08 00:42:10,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=3382, Unknown=0, NotChecked=0, Total=3906 [2025-03-08 00:42:10,573 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2025-03-08 00:42:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:11,319 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2025-03-08 00:42:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 00:42:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 95 [2025-03-08 00:42:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:11,320 INFO L225 Difference]: With dead ends: 140 [2025-03-08 00:42:11,320 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 00:42:11,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=902, Invalid=5260, Unknown=0, NotChecked=0, Total=6162 [2025-03-08 00:42:11,321 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:11,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 475 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 00:42:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2025-03-08 00:42:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2025-03-08 00:42:11,331 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 95 [2025-03-08 00:42:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:11,331 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2025-03-08 00:42:11,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.161290322580645) internal successors, (134), 58 states have internal predecessors, (134), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2025-03-08 00:42:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2025-03-08 00:42:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-08 00:42:11,332 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:11,332 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:11,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 00:42:11,532 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,SelfDestructingSolverStorable24 [2025-03-08 00:42:11,533 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:11,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1958524717, now seen corresponding path program 21 times [2025-03-08 00:42:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:11,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526072521] [2025-03-08 00:42:11,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:11,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:11,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 11 equivalence classes. [2025-03-08 00:42:11,562 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 96 of 96 statements. [2025-03-08 00:42:11,563 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 00:42:11,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 24 proven. 187 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:12,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526072521] [2025-03-08 00:42:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526072521] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088814554] [2025-03-08 00:42:12,011 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:42:12,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:12,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:12,012 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 00:42:12,014 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 00:42:12,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 11 equivalence classes. [2025-03-08 00:42:12,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 96 of 96 statements. [2025-03-08 00:42:12,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 00:42:12,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:12,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-08 00:42:12,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:12,370 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 00:42:12,419 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:12,419 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 00:42:12,470 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:12,470 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 00:42:12,557 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-08 00:42:12,557 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 00:42:12,690 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 00:42:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 108 proven. 181 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-03-08 00:42:12,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:12,879 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 00:42:12,881 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 00:42:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 187 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2025-03-08 00:42:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088814554] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:12,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:12,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 22] total 41 [2025-03-08 00:42:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314100724] [2025-03-08 00:42:12,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:12,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 00:42:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:12,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 00:42:12,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 00:42:12,975 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2025-03-08 00:42:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:13,542 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2025-03-08 00:42:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 00:42:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) Word has length 96 [2025-03-08 00:42:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:13,543 INFO L225 Difference]: With dead ends: 104 [2025-03-08 00:42:13,543 INFO L226 Difference]: Without dead ends: 102 [2025-03-08 00:42:13,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 00:42:13,544 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:13,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 610 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 00:42:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-08 00:42:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2025-03-08 00:42:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 00:42:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2025-03-08 00:42:13,559 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 96 [2025-03-08 00:42:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:13,560 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2025-03-08 00:42:13,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2025-03-08 00:42:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2025-03-08 00:42:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-08 00:42:13,560 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:13,560 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:13,567 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 00:42:13,760 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,SelfDestructingSolverStorable25 [2025-03-08 00:42:13,761 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:13,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash -428677747, now seen corresponding path program 22 times [2025-03-08 00:42:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340914443] [2025-03-08 00:42:13,762 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:13,771 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-08 00:42:13,788 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 00:42:13,788 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:13,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340914443] [2025-03-08 00:42:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340914443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596488279] [2025-03-08 00:42:14,246 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:42:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:14,248 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 00:42:14,250 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 00:42:14,309 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-08 00:42:14,341 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 00:42:14,342 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:42:14,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:14,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-08 00:42:14,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:14,715 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 00:42:14,792 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 23 treesize of output 11 [2025-03-08 00:42:15,090 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 00:42:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 61 proven. 221 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-08 00:42:15,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:15,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:42:15,293 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 25 treesize of output 21 [2025-03-08 00:42:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596488279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:15,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 53 [2025-03-08 00:42:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242172818] [2025-03-08 00:42:15,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:15,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-08 00:42:15,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:15,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-08 00:42:15,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 00:42:15,423 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-03-08 00:42:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:16,158 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2025-03-08 00:42:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 00:42:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 102 [2025-03-08 00:42:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:16,159 INFO L225 Difference]: With dead ends: 158 [2025-03-08 00:42:16,159 INFO L226 Difference]: Without dead ends: 156 [2025-03-08 00:42:16,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2025-03-08 00:42:16,160 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 181 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:16,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 663 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:42:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-08 00:42:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2025-03-08 00:42:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 00:42:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2025-03-08 00:42:16,177 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 102 [2025-03-08 00:42:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:16,177 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2025-03-08 00:42:16,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 48 states have internal predecessors, (106), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2025-03-08 00:42:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2025-03-08 00:42:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-08 00:42:16,178 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:16,178 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:16,183 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 00:42:16,378 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,SelfDestructingSolverStorable26 [2025-03-08 00:42:16,378 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:16,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1800117058, now seen corresponding path program 23 times [2025-03-08 00:42:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101487472] [2025-03-08 00:42:16,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:16,386 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 11 equivalence classes. [2025-03-08 00:42:16,401 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-03-08 00:42:16,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-08 00:42:16,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101487472] [2025-03-08 00:42:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101487472] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146630299] [2025-03-08 00:42:16,818 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:42:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:16,820 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 00:42:16,823 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 00:42:16,884 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 11 equivalence classes. [2025-03-08 00:42:16,924 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 105 of 105 statements. [2025-03-08 00:42:16,924 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-08 00:42:16,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:16,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-08 00:42:16,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:17,302 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 00:42:17,595 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 00:42:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 247 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-08 00:42:17,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:17,751 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 16 treesize of output 14 [2025-03-08 00:42:17,753 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 20 treesize of output 16 [2025-03-08 00:42:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:17,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146630299] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:17,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:17,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 50 [2025-03-08 00:42:17,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846289090] [2025-03-08 00:42:17,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:17,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-08 00:42:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:17,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-08 00:42:17,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2259, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 00:42:17,889 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2025-03-08 00:42:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:18,598 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2025-03-08 00:42:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:42:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 105 [2025-03-08 00:42:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:18,599 INFO L225 Difference]: With dead ends: 178 [2025-03-08 00:42:18,599 INFO L226 Difference]: Without dead ends: 176 [2025-03-08 00:42:18,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 177 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2025-03-08 00:42:18,600 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:18,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 770 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:42:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-08 00:42:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 116. [2025-03-08 00:42:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 00:42:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2025-03-08 00:42:18,619 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 105 [2025-03-08 00:42:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:18,619 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2025-03-08 00:42:18,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 46 states have internal predecessors, (105), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2025-03-08 00:42:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2025-03-08 00:42:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-08 00:42:18,620 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:18,620 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:18,628 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 00:42:18,821 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,SelfDestructingSolverStorable27 [2025-03-08 00:42:18,821 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:18,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash -324744211, now seen corresponding path program 24 times [2025-03-08 00:42:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950589542] [2025-03-08 00:42:18,821 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:18,830 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 108 statements into 11 equivalence classes. [2025-03-08 00:42:18,844 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 00:42:18,844 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 00:42:18,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 00:42:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950589542] [2025-03-08 00:42:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950589542] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565515268] [2025-03-08 00:42:19,046 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:42:19,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:19,048 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 00:42:19,049 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 00:42:19,118 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 108 statements into 11 equivalence classes. [2025-03-08 00:42:19,249 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 00:42:19,249 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 00:42:19,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:19,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 00:42:19,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 00:42:19,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 00:42:19,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565515268] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:19,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:19,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 33 [2025-03-08 00:42:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776572560] [2025-03-08 00:42:19,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:19,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 00:42:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:19,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 00:42:19,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 00:42:19,593 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-08 00:42:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:19,752 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2025-03-08 00:42:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 00:42:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 108 [2025-03-08 00:42:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:19,753 INFO L225 Difference]: With dead ends: 182 [2025-03-08 00:42:19,753 INFO L226 Difference]: Without dead ends: 149 [2025-03-08 00:42:19,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 00:42:19,754 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:19,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 182 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:42:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2025-03-08 00:42:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2025-03-08 00:42:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 00:42:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2025-03-08 00:42:19,767 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 108 [2025-03-08 00:42:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:19,768 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2025-03-08 00:42:19,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-08 00:42:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2025-03-08 00:42:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-03-08 00:42:19,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:19,768 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:19,775 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 00:42:19,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 00:42:19,969 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:19,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -114215972, now seen corresponding path program 25 times [2025-03-08 00:42:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970278980] [2025-03-08 00:42:19,969 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:19,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-08 00:42:19,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-08 00:42:19,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:19,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:42:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970278980] [2025-03-08 00:42:20,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970278980] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184592176] [2025-03-08 00:42:20,526 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:42:20,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:20,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:20,528 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 00:42:20,528 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 00:42:20,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-08 00:42:20,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-08 00:42:20,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:42:20,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:20,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-08 00:42:20,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:20,993 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 00:42:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:42:21,087 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 00:42:21,425 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 00:42:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 68 proven. 275 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-08 00:42:21,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:42:21,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-08 00:42:21,653 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 25 treesize of output 21 [2025-03-08 00:42:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:42:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184592176] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:42:21,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:42:21,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 28] total 56 [2025-03-08 00:42:21,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753897703] [2025-03-08 00:42:21,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:42:21,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-08 00:42:21,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:42:21,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-08 00:42:21,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 00:42:21,761 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-03-08 00:42:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:42:22,560 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2025-03-08 00:42:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 00:42:22,560 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 112 [2025-03-08 00:42:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:42:22,561 INFO L225 Difference]: With dead ends: 144 [2025-03-08 00:42:22,561 INFO L226 Difference]: Without dead ends: 142 [2025-03-08 00:42:22,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=4420, Unknown=0, NotChecked=0, Total=4830 [2025-03-08 00:42:22,562 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 114 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 00:42:22,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 680 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 00:42:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-08 00:42:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2025-03-08 00:42:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 00:42:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2025-03-08 00:42:22,596 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 112 [2025-03-08 00:42:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:42:22,596 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2025-03-08 00:42:22,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 52 states have internal predecessors, (118), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-03-08 00:42:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2025-03-08 00:42:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2025-03-08 00:42:22,596 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:42:22,597 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:42:22,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-08 00:42:22,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:22,797 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:42:22,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:42:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -993050609, now seen corresponding path program 26 times [2025-03-08 00:42:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:42:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44237588] [2025-03-08 00:42:22,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:42:22,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 115 statements into 2 equivalence classes. [2025-03-08 00:42:22,814 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-08 00:42:22,814 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:22,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 117 proven. 214 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-08 00:42:23,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:42:23,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44237588] [2025-03-08 00:42:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44237588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:42:23,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854509529] [2025-03-08 00:42:23,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:42:23,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:42:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:42:23,410 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 00:42:23,412 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 00:42:23,483 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 115 statements into 2 equivalence classes. [2025-03-08 00:42:23,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-08 00:42:23,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:42:23,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:42:23,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-03-08 00:42:23,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:42:24,008 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 00:42:24,389 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 00:42:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 27 proven. 325 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2025-03-08 00:42:24,409 INFO L312 TraceCheckSpWp]: Computing backward predicates...