./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s32if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s32if.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 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:59:02,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:59:02,931 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:59:02,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:59:02,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:59:02,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:59:02,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:59:02,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:59:02,963 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:59:02,963 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:59:02,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:59:02,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:59:02,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:59:02,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:59:02,964 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:59:02,965 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:59:02,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:59:02,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:59:02,965 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 -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2025-03-16 13:59:03,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:59:03,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:59:03,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:59:03,171 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:59:03,172 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:59:03,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s32if.c [2025-03-16 13:59:04,295 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcbfc642/07a5dfbb751d4447a68ea6d17d69bf4a/FLAGa67696f32 [2025-03-16 13:59:04,520 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:59:04,520 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c [2025-03-16 13:59:04,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcbfc642/07a5dfbb751d4447a68ea6d17d69bf4a/FLAGa67696f32 [2025-03-16 13:59:04,540 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcbfc642/07a5dfbb751d4447a68ea6d17d69bf4a [2025-03-16 13:59:04,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:59:04,543 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:59:04,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:59:04,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:59:04,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:59:04,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec503c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04, skipping insertion in model container [2025-03-16 13:59:04,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,563 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:59:04,675 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-fpi/s32if.c[588,601] [2025-03-16 13:59:04,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:59:04,697 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:59:04,705 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-fpi/s32if.c[588,601] [2025-03-16 13:59:04,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:59:04,725 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:59:04,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04 WrapperNode [2025-03-16 13:59:04,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:59:04,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:59:04,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:59:04,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:59:04,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,751 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2025-03-16 13:59:04,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:59:04,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:59:04,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:59:04,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:59:04,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,777 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 6, 9]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2025-03-16 13:59:04,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,785 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:59:04,788 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:59:04,788 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:59:04,788 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:59:04,789 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (1/1) ... [2025-03-16 13:59:04,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:59:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:04,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:59:04,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:59:04,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:59:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:59:04,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:59:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:59:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:59:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:59:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 13:59:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:59:04,888 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:59:04,889 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:59:05,025 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#sum~0#1.base, main_~#sum~0#1.offset);havoc main_~#sum~0#1.base, main_~#sum~0#1.offset; [2025-03-16 13:59:05,029 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:59:05,030 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:59:05,036 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:59:05,037 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:59:05,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:59:05 BoogieIcfgContainer [2025-03-16 13:59:05,038 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:59:05,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:59:05,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:59:05,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:59:05,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:59:04" (1/3) ... [2025-03-16 13:59:05,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7b9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:59:05, skipping insertion in model container [2025-03-16 13:59:05,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:59:04" (2/3) ... [2025-03-16 13:59:05,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7b9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:59:05, skipping insertion in model container [2025-03-16 13:59:05,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:59:05" (3/3) ... [2025-03-16 13:59:05,046 INFO L128 eAbstractionObserver]: Analyzing ICFG s32if.c [2025-03-16 13:59:05,057 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:59:05,058 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG s32if.c that has 1 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:59:05,097 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:59:05,107 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;@1969baf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:59:05,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:59:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:59:05,116 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:05,116 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:05,116 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:05,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1702049747, now seen corresponding path program 1 times [2025-03-16 13:59:05,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:05,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663248009] [2025-03-16 13:59:05,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:05,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:59:05,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:59:05,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:05,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:05,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:05,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663248009] [2025-03-16 13:59:05,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663248009] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:59:05,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:59:05,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:59:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926818072] [2025-03-16 13:59:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:59:05,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:59:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:05,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:59:05,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:59:05,242 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:05,249 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2025-03-16 13:59:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:59:05,250 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:59:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:05,253 INFO L225 Difference]: With dead ends: 33 [2025-03-16 13:59:05,253 INFO L226 Difference]: Without dead ends: 14 [2025-03-16 13:59:05,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:59:05,257 INFO L435 NwaCegarLoop]: 23 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, 23 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 [2025-03-16 13:59:05,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:59:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-16 13:59:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-16 13:59:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-03-16 13:59:05,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2025-03-16 13:59:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:05,280 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-03-16 13:59:05,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-03-16 13:59:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:59:05,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:05,282 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:05,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:59:05,283 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:05,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash -814546066, now seen corresponding path program 1 times [2025-03-16 13:59:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:05,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794993195] [2025-03-16 13:59:05,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:05,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:59:05,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:59:05,310 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:05,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:05,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794993195] [2025-03-16 13:59:05,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794993195] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:59:05,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:59:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:59:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452509056] [2025-03-16 13:59:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:59:05,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:59:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:05,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:59:05,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:59:05,425 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:05,471 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2025-03-16 13:59:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:59:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:59:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:05,473 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:59:05,473 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 13:59:05,473 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 [2025-03-16 13:59:05,473 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:05,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:59:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 13:59:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2025-03-16 13:59:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-16 13:59:05,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2025-03-16 13:59:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:05,478 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-16 13:59:05,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-16 13:59:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:59:05,478 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:05,478 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:05,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:59:05,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:05,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:05,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2089170647, now seen corresponding path program 1 times [2025-03-16 13:59:05,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:05,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704733989] [2025-03-16 13:59:05,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:05,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:05,489 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:05,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:05,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:05,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704733989] [2025-03-16 13:59:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704733989] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951507948] [2025-03-16 13:59:05,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:05,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:05,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:59:06,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:06,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:06,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:06,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:06,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:59:06,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:06,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:59:06,159 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 0 case distinctions, treesize of input 36 treesize of output 13 [2025-03-16 13:59:06,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:59:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:06,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:06,359 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 14 treesize of output 12 [2025-03-16 13:59:06,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-16 13:59:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951507948] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:06,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-16 13:59:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555476897] [2025-03-16 13:59:06,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:06,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:59:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:06,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:59:06,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:59:06,385 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:07,488 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2025-03-16 13:59:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:59:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:59:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:07,491 INFO L225 Difference]: With dead ends: 128 [2025-03-16 13:59:07,491 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 13:59:07,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=762, Invalid=3528, Unknown=0, NotChecked=0, Total=4290 [2025-03-16 13:59:07,493 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 270 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:07,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 54 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 13:59:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2025-03-16 13:59:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2025-03-16 13:59:07,504 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 16 [2025-03-16 13:59:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:07,505 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2025-03-16 13:59:07,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2025-03-16 13:59:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:59:07,506 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:07,506 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:07,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:59:07,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:07,707 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:07,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2090094168, now seen corresponding path program 1 times [2025-03-16 13:59:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827644645] [2025-03-16 13:59:07,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:07,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:07,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:07,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:07,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:07,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827644645] [2025-03-16 13:59:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827644645] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617874409] [2025-03-16 13:59:07,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:07,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:07,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:59:07,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:07,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:07,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:07,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:07,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:59:07,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:07,906 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 11 treesize of output 7 [2025-03-16 13:59:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:07,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:07,944 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 14 treesize of output 12 [2025-03-16 13:59:07,948 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 14 treesize of output 12 [2025-03-16 13:59:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617874409] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:07,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:59:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404758830] [2025-03-16 13:59:07,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:07,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:59:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:07,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:59:07,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:59:07,955 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:08,010 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2025-03-16 13:59:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:59:08,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:59:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:08,011 INFO L225 Difference]: With dead ends: 71 [2025-03-16 13:59:08,011 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 13:59:08,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:59:08,011 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:08,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:59:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 13:59:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-16 13:59:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-16 13:59:08,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2025-03-16 13:59:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:08,017 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-16 13:59:08,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-16 13:59:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:59:08,017 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:08,017 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:08,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:08,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:59:08,224 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:08,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash -397418665, now seen corresponding path program 1 times [2025-03-16 13:59:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412830614] [2025-03-16 13:59:08,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:08,233 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:08,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:08,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:08,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412830614] [2025-03-16 13:59:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412830614] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122324658] [2025-03-16 13:59:08,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:08,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:08,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:08,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:59:08,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:59:08,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:59:08,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:08,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:08,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 13:59:08,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:08,553 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:08,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:08,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2025-03-16 13:59:08,622 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:59:08,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2025-03-16 13:59:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122324658] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:08,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:08,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-03-16 13:59:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831257695] [2025-03-16 13:59:08,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:08,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:59:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:08,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:59:08,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:59:08,634 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:08,741 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2025-03-16 13:59:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:59:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:59:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:08,742 INFO L225 Difference]: With dead ends: 72 [2025-03-16 13:59:08,743 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 13:59:08,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:59:08,743 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:08,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 13:59:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2025-03-16 13:59:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2025-03-16 13:59:08,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 16 [2025-03-16 13:59:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:08,749 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2025-03-16 13:59:08,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2025-03-16 13:59:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:59:08,749 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:08,749 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:08,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:08,950 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:08,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -643528403, now seen corresponding path program 1 times [2025-03-16 13:59:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366402554] [2025-03-16 13:59:08,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:08,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:59:08,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:59:08,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:08,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366402554] [2025-03-16 13:59:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366402554] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33918034] [2025-03-16 13:59:09,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:09,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:09,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:59:09,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:59:09,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:59:09,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:09,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:59:09,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33918034] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:09,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:59:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018881163] [2025-03-16 13:59:09,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:09,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:59:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:09,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:59:09,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:59:09,131 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:09,270 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2025-03-16 13:59:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:59:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 13:59:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:09,271 INFO L225 Difference]: With dead ends: 72 [2025-03-16 13:59:09,271 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 13:59:09,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:59:09,272 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:09,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 26 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 13:59:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2025-03-16 13:59:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2025-03-16 13:59:09,281 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 17 [2025-03-16 13:59:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:09,282 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2025-03-16 13:59:09,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2025-03-16 13:59:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:59:09,283 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:09,283 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:09,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:59:09,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:09,484 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:09,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash 100913453, now seen corresponding path program 2 times [2025-03-16 13:59:09,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:09,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494392333] [2025-03-16 13:59:09,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:09,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:09,497 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:59:09,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:59:09,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:09,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494392333] [2025-03-16 13:59:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494392333] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798289479] [2025-03-16 13:59:09,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:09,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:09,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:59:09,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:59:09,607 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:59:09,608 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:09,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:09,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:59:09,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798289479] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:09,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:09,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:59:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383591861] [2025-03-16 13:59:09,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:09,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:59:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:09,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:59:09,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:59:09,681 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:09,758 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2025-03-16 13:59:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:59:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 13:59:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:09,759 INFO L225 Difference]: With dead ends: 65 [2025-03-16 13:59:09,759 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:59:09,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:59:09,759 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:09,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:59:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2025-03-16 13:59:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-16 13:59:09,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2025-03-16 13:59:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:09,766 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-16 13:59:09,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-16 13:59:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:59:09,766 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:09,766 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:09,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:59:09,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:09,967 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:09,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1738020749, now seen corresponding path program 1 times [2025-03-16 13:59:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97287599] [2025-03-16 13:59:09,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:09,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:09,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:09,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:09,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97287599] [2025-03-16 13:59:10,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97287599] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295886649] [2025-03-16 13:59:10,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:10,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:10,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:10,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:59:10,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:10,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:10,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:10,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:10,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 13:59:10,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:10,450 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 11 treesize of output 7 [2025-03-16 13:59:10,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:10,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 13:59:10,534 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:10,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:10,781 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 17 treesize of output 15 [2025-03-16 13:59:10,783 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 12 treesize of output 8 [2025-03-16 13:59:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:10,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295886649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:10,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:10,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 31 [2025-03-16 13:59:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157102786] [2025-03-16 13:59:10,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:10,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 13:59:10,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:10,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 13:59:10,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:59:10,820 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:13,667 INFO L93 Difference]: Finished difference Result 234 states and 332 transitions. [2025-03-16 13:59:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2025-03-16 13:59:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:59:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:13,668 INFO L225 Difference]: With dead ends: 234 [2025-03-16 13:59:13,668 INFO L226 Difference]: Without dead ends: 223 [2025-03-16 13:59:13,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2025-03-16 13:59:13,673 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 346 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:13,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 98 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:59:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-03-16 13:59:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 88. [2025-03-16 13:59:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 87 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2025-03-16 13:59:13,690 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 23 [2025-03-16 13:59:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:13,692 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2025-03-16 13:59:13,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2025-03-16 13:59:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:59:13,693 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:13,693 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:13,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:13,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:13,893 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:13,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1738944270, now seen corresponding path program 1 times [2025-03-16 13:59:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:13,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829048260] [2025-03-16 13:59:13,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:13,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:13,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:13,920 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:13,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:14,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:14,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829048260] [2025-03-16 13:59:14,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829048260] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420691284] [2025-03-16 13:59:14,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:14,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:14,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:59:14,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:14,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:14,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:14,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:14,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:59:14,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:14,204 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 11 treesize of output 7 [2025-03-16 13:59:14,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:14,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 13:59:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:14,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:14,253 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 [2025-03-16 13:59:14,255 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 16 treesize of output 12 [2025-03-16 13:59:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420691284] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:14,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-16 13:59:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023009157] [2025-03-16 13:59:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:14,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:59:14,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:14,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:59:14,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:59:14,270 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:14,357 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2025-03-16 13:59:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:59:14,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:59:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:14,358 INFO L225 Difference]: With dead ends: 127 [2025-03-16 13:59:14,358 INFO L226 Difference]: Without dead ends: 67 [2025-03-16 13:59:14,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:59:14,359 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:14,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-16 13:59:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2025-03-16 13:59:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2025-03-16 13:59:14,365 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 23 [2025-03-16 13:59:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:14,366 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2025-03-16 13:59:14,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2025-03-16 13:59:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:59:14,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:14,366 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:14,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:14,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:14,567 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:14,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1609861551, now seen corresponding path program 1 times [2025-03-16 13:59:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:14,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484261111] [2025-03-16 13:59:14,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:14,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:14,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:14,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:14,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484261111] [2025-03-16 13:59:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484261111] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813020556] [2025-03-16 13:59:14,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:59:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:14,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:14,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:59:14,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:59:14,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:59:14,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:14,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:14,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 13:59:14,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:15,006 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:59:15,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:15,110 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 29 treesize of output 25 [2025-03-16 13:59:15,117 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:59:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2025-03-16 13:59:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:59:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813020556] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:15,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 24 [2025-03-16 13:59:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289201769] [2025-03-16 13:59:15,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:15,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:59:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:15,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:59:15,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:59:15,148 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:15,435 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2025-03-16 13:59:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 13:59:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:59:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:15,436 INFO L225 Difference]: With dead ends: 88 [2025-03-16 13:59:15,436 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 13:59:15,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:59:15,437 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:15,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 57 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:59:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 13:59:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2025-03-16 13:59:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2025-03-16 13:59:15,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 23 [2025-03-16 13:59:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:15,448 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2025-03-16 13:59:15,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2025-03-16 13:59:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:59:15,448 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:15,448 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:15,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:15,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:59:15,653 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:15,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1935748873, now seen corresponding path program 3 times [2025-03-16 13:59:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:15,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188627841] [2025-03-16 13:59:15,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:15,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-16 13:59:15,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:59:15,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:15,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188627841] [2025-03-16 13:59:15,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188627841] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554850242] [2025-03-16 13:59:15,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:15,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:15,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:15,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:59:15,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-16 13:59:15,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:59:15,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:15,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:15,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:59:15,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:15,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:59:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554850242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:15,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-16 13:59:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147534916] [2025-03-16 13:59:15,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:15,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:59:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:15,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:59:15,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:59:15,955 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:16,118 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2025-03-16 13:59:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:59:16,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-16 13:59:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:16,120 INFO L225 Difference]: With dead ends: 107 [2025-03-16 13:59:16,120 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 13:59:16,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:16,121 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:16,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 24 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 13:59:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2025-03-16 13:59:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2025-03-16 13:59:16,130 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 24 [2025-03-16 13:59:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:16,130 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2025-03-16 13:59:16,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2025-03-16 13:59:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:59:16,131 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:16,131 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:16,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:16,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:16,332 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:16,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash 156166101, now seen corresponding path program 4 times [2025-03-16 13:59:16,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560144153] [2025-03-16 13:59:16,332 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:16,339 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:59:16,342 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 13:59:16,342 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:16,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:59:16,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:16,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560144153] [2025-03-16 13:59:16,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560144153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:16,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908098722] [2025-03-16 13:59:16,383 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:16,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:16,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:16,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:16,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:59:16,425 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 13:59:16,433 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-16 13:59:16,434 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:16,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:16,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:59:16,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:59:16,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:59:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908098722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:16,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-03-16 13:59:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048930720] [2025-03-16 13:59:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:16,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:59:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:16,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:59:16,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:59:16,531 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:16,616 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2025-03-16 13:59:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:59:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 13:59:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:16,617 INFO L225 Difference]: With dead ends: 95 [2025-03-16 13:59:16,617 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 13:59:16,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:59:16,619 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:16,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 13:59:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2025-03-16 13:59:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2025-03-16 13:59:16,626 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2025-03-16 13:59:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:16,626 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2025-03-16 13:59:16,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2025-03-16 13:59:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 13:59:16,628 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:16,628 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:16,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:16,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:59:16,829 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:16,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1087963607, now seen corresponding path program 2 times [2025-03-16 13:59:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:16,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990881747] [2025-03-16 13:59:16,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:16,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:16,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:16,851 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:16,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990881747] [2025-03-16 13:59:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990881747] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928046800] [2025-03-16 13:59:17,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:17,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:17,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:59:17,178 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:17,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:17,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:17,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:17,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 13:59:17,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:17,207 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 11 treesize of output 7 [2025-03-16 13:59:17,314 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:17,380 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:17,464 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:17,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:17,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928046800] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:17,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:17,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2025-03-16 13:59:17,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013068831] [2025-03-16 13:59:17,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:17,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 13:59:17,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:17,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 13:59:17,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:59:17,863 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:19,074 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2025-03-16 13:59:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 13:59:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-16 13:59:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:19,075 INFO L225 Difference]: With dead ends: 116 [2025-03-16 13:59:19,075 INFO L226 Difference]: Without dead ends: 99 [2025-03-16 13:59:19,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=431, Invalid=4261, Unknown=0, NotChecked=0, Total=4692 [2025-03-16 13:59:19,076 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:19,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 73 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:59:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-16 13:59:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2025-03-16 13:59:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2025-03-16 13:59:19,088 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 30 [2025-03-16 13:59:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:19,088 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2025-03-16 13:59:19,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2025-03-16 13:59:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 13:59:19,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:19,089 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:19,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:59:19,291 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:19,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash -418664681, now seen corresponding path program 2 times [2025-03-16 13:59:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:19,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990516357] [2025-03-16 13:59:19,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:19,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:19,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:19,310 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:19,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:19,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:59:19,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990516357] [2025-03-16 13:59:19,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990516357] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890911548] [2025-03-16 13:59:19,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:19,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:19,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:19,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:59:19,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-16 13:59:19,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 13:59:19,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:19,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:19,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-16 13:59:19,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:19,729 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:59:19,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:19,833 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 29 treesize of output 25 [2025-03-16 13:59:19,836 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 13:59:19,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2025-03-16 13:59:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:59:19,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890911548] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:19,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:19,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 30 [2025-03-16 13:59:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459003971] [2025-03-16 13:59:19,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:19,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-16 13:59:19,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:19,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-16 13:59:19,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:59:19,880 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:20,260 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2025-03-16 13:59:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:59:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-03-16 13:59:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:20,261 INFO L225 Difference]: With dead ends: 117 [2025-03-16 13:59:20,261 INFO L226 Difference]: Without dead ends: 111 [2025-03-16 13:59:20,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:59:20,262 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 174 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:20,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 61 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:59:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-16 13:59:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2025-03-16 13:59:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2025-03-16 13:59:20,279 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 30 [2025-03-16 13:59:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:20,279 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2025-03-16 13:59:20,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2025-03-16 13:59:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:59:20,280 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:20,280 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:20,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:20,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:59:20,481 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:20,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1182026579, now seen corresponding path program 5 times [2025-03-16 13:59:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142960663] [2025-03-16 13:59:20,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:20,496 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-16 13:59:20,507 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:59:20,507 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:59:20,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:20,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142960663] [2025-03-16 13:59:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142960663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:20,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628696080] [2025-03-16 13:59:20,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:20,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:20,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:20,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:59:20,638 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-16 13:59:20,669 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:59:20,669 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 13:59:20,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:20,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:59:20,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:20,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628696080] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:20,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:20,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2025-03-16 13:59:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378001783] [2025-03-16 13:59:20,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:20,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 13:59:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:20,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 13:59:20,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:59:20,794 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:21,011 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2025-03-16 13:59:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:59:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 13:59:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:21,013 INFO L225 Difference]: With dead ends: 139 [2025-03-16 13:59:21,013 INFO L226 Difference]: Without dead ends: 123 [2025-03-16 13:59:21,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:59:21,013 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:21,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 22 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-16 13:59:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2025-03-16 13:59:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2025-03-16 13:59:21,027 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 31 [2025-03-16 13:59:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:21,027 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2025-03-16 13:59:21,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2025-03-16 13:59:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:59:21,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:21,027 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:21,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 13:59:21,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 13:59:21,232 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:21,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1478956691, now seen corresponding path program 6 times [2025-03-16 13:59:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151423451] [2025-03-16 13:59:21,233 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:59:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:21,239 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:59:21,260 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:59:21,260 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:59:21,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151423451] [2025-03-16 13:59:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151423451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505540503] [2025-03-16 13:59:21,334 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:59:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:21,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:59:21,383 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:59:21,410 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:59:21,410 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:59:21,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:21,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:59:21,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:21,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505540503] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:21,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-16 13:59:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187884947] [2025-03-16 13:59:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:21,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:59:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:21,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:59:21,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:59:21,564 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:21,668 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2025-03-16 13:59:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:59:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-16 13:59:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:21,669 INFO L225 Difference]: With dead ends: 124 [2025-03-16 13:59:21,669 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:59:21,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:21,669 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:21,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 23 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:59:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2025-03-16 13:59:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2025-03-16 13:59:21,676 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 33 [2025-03-16 13:59:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:21,676 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2025-03-16 13:59:21,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2025-03-16 13:59:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:59:21,676 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:21,676 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:21,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:21,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:21,877 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:21,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1314561267, now seen corresponding path program 3 times [2025-03-16 13:59:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528414341] [2025-03-16 13:59:21,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:21,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:21,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:21,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:59:21,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 13:59:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528414341] [2025-03-16 13:59:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528414341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45028131] [2025-03-16 13:59:22,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:22,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:22,592 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:22,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:59:22,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:22,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:22,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:59:22,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:22,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:59:22,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:22,688 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 11 treesize of output 7 [2025-03-16 13:59:22,851 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:22,921 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:23,008 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:23,108 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:23,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45028131] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:23,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:23,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 51 [2025-03-16 13:59:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89168217] [2025-03-16 13:59:23,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:23,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-16 13:59:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:23,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-16 13:59:23,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2382, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 13:59:23,755 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:29,148 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2025-03-16 13:59:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2025-03-16 13:59:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:59:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:29,149 INFO L225 Difference]: With dead ends: 227 [2025-03-16 13:59:29,150 INFO L226 Difference]: Without dead ends: 218 [2025-03-16 13:59:29,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9061 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2618, Invalid=27484, Unknown=0, NotChecked=0, Total=30102 [2025-03-16 13:59:29,154 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 286 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2937 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:29,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 130 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2937 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 13:59:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-16 13:59:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2025-03-16 13:59:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.289655172413793) internal successors, (187), 145 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2025-03-16 13:59:29,180 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 37 [2025-03-16 13:59:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:29,180 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2025-03-16 13:59:29,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2025-03-16 13:59:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:59:29,181 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:29,181 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:29,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 13:59:29,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:59:29,381 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:29,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1313637746, now seen corresponding path program 2 times [2025-03-16 13:59:29,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:29,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608068784] [2025-03-16 13:59:29,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:29,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:29,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:59:29,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:29,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:29,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:29,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608068784] [2025-03-16 13:59:29,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608068784] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848462738] [2025-03-16 13:59:29,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:29,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:29,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:29,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:59:29,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:59:29,736 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:59:29,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:29,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:29,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 13:59:29,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:29,753 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 11 treesize of output 7 [2025-03-16 13:59:29,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:29,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 13:59:29,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:29,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 13:59:29,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:29,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 13:59:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:29,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:29,870 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 [2025-03-16 13:59:29,871 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 16 treesize of output 12 [2025-03-16 13:59:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848462738] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:29,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2025-03-16 13:59:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351255731] [2025-03-16 13:59:29,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:29,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:59:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:29,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:59:29,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:59:29,904 INFO L87 Difference]: Start difference. First operand 146 states and 187 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:30,076 INFO L93 Difference]: Finished difference Result 235 states and 309 transitions. [2025-03-16 13:59:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:59:30,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:59:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:30,079 INFO L225 Difference]: With dead ends: 235 [2025-03-16 13:59:30,079 INFO L226 Difference]: Without dead ends: 153 [2025-03-16 13:59:30,079 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:59:30,079 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:30,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-16 13:59:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2025-03-16 13:59:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2727272727272727) internal successors, (182), 143 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2025-03-16 13:59:30,104 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 37 [2025-03-16 13:59:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:30,104 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2025-03-16 13:59:30,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2025-03-16 13:59:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:59:30,104 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:30,105 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:30,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:30,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:59:30,305 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:30,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash -316565393, now seen corresponding path program 3 times [2025-03-16 13:59:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104876648] [2025-03-16 13:59:30,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:30,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:30,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-03-16 13:59:30,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:30,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:59:30,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104876648] [2025-03-16 13:59:30,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104876648] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709570965] [2025-03-16 13:59:30,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:30,601 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:30,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:59:30,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 5 equivalence classes. [2025-03-16 13:59:30,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 25 of 37 statements. [2025-03-16 13:59:30,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:59:30,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:30,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 13:59:30,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:30,701 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 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-16 13:59:30,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:30,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-03-16 13:59:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:59:30,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-16 13:59:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709570965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:30,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:30,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 25 [2025-03-16 13:59:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562416507] [2025-03-16 13:59:30,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:30,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:59:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:30,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:59:30,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:59:30,964 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:32,045 INFO L93 Difference]: Finished difference Result 290 states and 378 transitions. [2025-03-16 13:59:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-16 13:59:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:59:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:32,046 INFO L225 Difference]: With dead ends: 290 [2025-03-16 13:59:32,046 INFO L226 Difference]: Without dead ends: 244 [2025-03-16 13:59:32,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1026, Invalid=3530, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 13:59:32,047 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 233 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:32,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 99 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-03-16 13:59:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 191. [2025-03-16 13:59:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.3157894736842106) internal successors, (250), 190 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2025-03-16 13:59:32,083 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 37 [2025-03-16 13:59:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:32,084 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2025-03-16 13:59:32,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2025-03-16 13:59:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:59:32,084 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:32,084 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:32,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:32,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:32,285 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:32,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1776956425, now seen corresponding path program 7 times [2025-03-16 13:59:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809016282] [2025-03-16 13:59:32,285 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:59:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:32,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:59:32,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:59:32,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:32,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:32,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:32,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809016282] [2025-03-16 13:59:32,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809016282] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:32,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934152384] [2025-03-16 13:59:32,392 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:59:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:32,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:32,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:59:32,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:59:32,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:59:32,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:59:32,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:32,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:59:32,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:32,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:59:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934152384] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:32,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:32,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-16 13:59:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427104593] [2025-03-16 13:59:32,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:32,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 13:59:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:32,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 13:59:32,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:32,633 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:32,869 INFO L93 Difference]: Finished difference Result 235 states and 303 transitions. [2025-03-16 13:59:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:59:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:59:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:32,870 INFO L225 Difference]: With dead ends: 235 [2025-03-16 13:59:32,870 INFO L226 Difference]: Without dead ends: 211 [2025-03-16 13:59:32,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:59:32,871 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:32,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 20 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-03-16 13:59:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2025-03-16 13:59:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 179 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 230 transitions. [2025-03-16 13:59:32,903 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 230 transitions. Word has length 38 [2025-03-16 13:59:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:32,903 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 230 transitions. [2025-03-16 13:59:32,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 230 transitions. [2025-03-16 13:59:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:32,903 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:32,903 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:32,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:33,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:33,104 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:33,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2007302953, now seen corresponding path program 4 times [2025-03-16 13:59:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:33,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814112139] [2025-03-16 13:59:33,104 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:33,111 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:33,121 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:33,121 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:33,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-03-16 13:59:33,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814112139] [2025-03-16 13:59:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814112139] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219621942] [2025-03-16 13:59:33,337 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:33,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:33,339 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:33,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:59:33,405 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:33,424 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:33,425 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:33,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:33,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:59:33,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:33,431 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 11 [2025-03-16 13:59:33,482 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2025-03-16 13:59:33,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2025-03-16 13:59:33,572 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2025-03-16 13:59:33,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 58 [2025-03-16 13:59:33,676 INFO L349 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2025-03-16 13:59:33,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 80 [2025-03-16 13:59:33,847 INFO L349 Elim1Store]: treesize reduction 43, result has 36.8 percent of original size [2025-03-16 13:59:33,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 88 treesize of output 102 [2025-03-16 13:59:34,053 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2025-03-16 13:59:34,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 35 [2025-03-16 13:59:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 13:59:34,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:59:34,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219621942] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:34,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:34,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 21] total 40 [2025-03-16 13:59:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30248150] [2025-03-16 13:59:34,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:34,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:59:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:34,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:59:34,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:59:34,667 INFO L87 Difference]: Start difference. First operand 180 states and 230 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:35,681 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2025-03-16 13:59:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-16 13:59:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:35,683 INFO L225 Difference]: With dead ends: 200 [2025-03-16 13:59:35,683 INFO L226 Difference]: Without dead ends: 116 [2025-03-16 13:59:35,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=2799, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 13:59:35,683 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:35,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 81 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:59:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-16 13:59:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2025-03-16 13:59:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 93 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2025-03-16 13:59:35,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2025-03-16 13:59:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:35,700 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2025-03-16 13:59:35,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2025-03-16 13:59:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:35,700 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:35,700 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:35,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 13:59:35,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:35,901 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:35,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2076313430, now seen corresponding path program 8 times [2025-03-16 13:59:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462022523] [2025-03-16 13:59:35,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:35,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:35,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:35,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:35,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462022523] [2025-03-16 13:59:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462022523] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324958470] [2025-03-16 13:59:36,995 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:59:36,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:36,996 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 13:59:37,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:37,084 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 13:59:37,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:59:37,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:37,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 13:59:37,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:37,095 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 11 treesize of output 7 [2025-03-16 13:59:37,334 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:37,431 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:37,540 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:37,665 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:37,803 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:59:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:37,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324958470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:38,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 59 [2025-03-16 13:59:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090171573] [2025-03-16 13:59:38,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:38,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-03-16 13:59:38,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:38,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-03-16 13:59:38,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3230, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 13:59:38,757 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 59 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:42,237 INFO L93 Difference]: Finished difference Result 226 states and 283 transitions. [2025-03-16 13:59:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-16 13:59:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:42,239 INFO L225 Difference]: With dead ends: 226 [2025-03-16 13:59:42,239 INFO L226 Difference]: Without dead ends: 217 [2025-03-16 13:59:42,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3533 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=886, Invalid=13156, Unknown=0, NotChecked=0, Total=14042 [2025-03-16 13:59:42,241 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:42,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 124 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-16 13:59:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2025-03-16 13:59:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2025-03-16 13:59:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.2456140350877194) internal successors, (213), 171 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2025-03-16 13:59:42,280 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 44 [2025-03-16 13:59:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:42,280 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2025-03-16 13:59:42,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2025-03-16 13:59:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:59:42,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:42,281 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:42,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 13:59:42,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 13:59:42,485 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:42,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -475843531, now seen corresponding path program 4 times [2025-03-16 13:59:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:42,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337827718] [2025-03-16 13:59:42,485 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:42,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:42,492 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:42,502 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:42,502 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:42,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:59:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337827718] [2025-03-16 13:59:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337827718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242920011] [2025-03-16 13:59:42,950 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:42,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:42,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 13:59:43,016 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:59:43,030 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:59:43,030 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:43,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:43,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 13:59:43,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:43,095 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 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:43,141 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2025-03-16 13:59:43,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-16 13:59:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:43,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:43,500 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 53 treesize of output 47 [2025-03-16 13:59:43,510 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2025-03-16 13:59:43,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 58 [2025-03-16 13:59:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242920011] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:43,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:43,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 15] total 41 [2025-03-16 13:59:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505744462] [2025-03-16 13:59:43,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:43,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 13:59:43,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:43,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 13:59:43,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:59:43,528 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:44,237 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2025-03-16 13:59:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 13:59:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:59:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:44,238 INFO L225 Difference]: With dead ends: 190 [2025-03-16 13:59:44,238 INFO L226 Difference]: Without dead ends: 162 [2025-03-16 13:59:44,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=619, Invalid=3803, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:59:44,239 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:44,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2025-03-16 13:59:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2025-03-16 13:59:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2025-03-16 13:59:44,268 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 44 [2025-03-16 13:59:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:44,268 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2025-03-16 13:59:44,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2025-03-16 13:59:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 13:59:44,269 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:44,269 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:44,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 13:59:44,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-16 13:59:44,469 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:44,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1416630227, now seen corresponding path program 9 times [2025-03-16 13:59:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:44,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438229037] [2025-03-16 13:59:44,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:44,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:44,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:59:44,487 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:59:44,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:59:44,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438229037] [2025-03-16 13:59:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438229037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435097816] [2025-03-16 13:59:44,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:44,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:44,622 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:59:44,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 13:59:44,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 6 equivalence classes. [2025-03-16 13:59:44,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 13:59:44,753 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:59:44,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:44,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:59:44,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:44,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-16 13:59:44,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435097816] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:44,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:44,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-16 13:59:44,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790159691] [2025-03-16 13:59:44,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:44,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:59:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:44,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:59:44,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:59:44,940 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:45,306 INFO L93 Difference]: Finished difference Result 213 states and 252 transitions. [2025-03-16 13:59:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:59:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-03-16 13:59:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:45,307 INFO L225 Difference]: With dead ends: 213 [2025-03-16 13:59:45,307 INFO L226 Difference]: Without dead ends: 192 [2025-03-16 13:59:45,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:59:45,308 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:45,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 36 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-03-16 13:59:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 130. [2025-03-16 13:59:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 129 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2025-03-16 13:59:45,333 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 45 [2025-03-16 13:59:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:45,333 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2025-03-16 13:59:45,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2025-03-16 13:59:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:59:45,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:45,334 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:45,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:45,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:45,534 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:45,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -547266131, now seen corresponding path program 10 times [2025-03-16 13:59:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:45,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157437806] [2025-03-16 13:59:45,535 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:45,542 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:59:45,546 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 44 of 47 statements. [2025-03-16 13:59:45,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:45,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:45,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157437806] [2025-03-16 13:59:45,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157437806] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864462252] [2025-03-16 13:59:45,652 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:45,654 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) [2025-03-16 13:59:45,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 13:59:45,730 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:59:45,747 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 44 of 47 statements. [2025-03-16 13:59:45,747 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:45,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:45,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:59:45,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:45,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:59:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864462252] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:45,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:45,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2025-03-16 13:59:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416062461] [2025-03-16 13:59:45,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:45,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 13:59:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:45,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 13:59:45,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2025-03-16 13:59:45,946 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:46,157 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2025-03-16 13:59:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:59:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:59:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:46,162 INFO L225 Difference]: With dead ends: 193 [2025-03-16 13:59:46,162 INFO L226 Difference]: Without dead ends: 77 [2025-03-16 13:59:46,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:59:46,163 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:46,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-16 13:59:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2025-03-16 13:59:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2025-03-16 13:59:46,178 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 47 [2025-03-16 13:59:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:46,178 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2025-03-16 13:59:46,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2025-03-16 13:59:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:59:46,179 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:46,179 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:46,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 13:59:46,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:46,383 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:46,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 42156143, now seen corresponding path program 5 times [2025-03-16 13:59:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:46,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482200705] [2025-03-16 13:59:46,384 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:46,391 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:46,399 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:46,399 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:46,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2025-03-16 13:59:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482200705] [2025-03-16 13:59:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482200705] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590181275] [2025-03-16 13:59:46,879 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:46,881 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) [2025-03-16 13:59:46,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 13:59:46,955 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:48,344 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:48,344 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:48,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:48,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-16 13:59:48,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:48,404 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 13 treesize of output 9 [2025-03-16 13:59:48,430 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 13:59:48,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 13:59:48,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:48,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2025-03-16 13:59:48,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:48,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 13:59:48,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:48,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 13:59:48,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:48,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 13:59:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 47 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 13:59:48,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:48,717 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 23 treesize of output 21 [2025-03-16 13:59:48,719 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 42 treesize of output 38 [2025-03-16 13:59:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 47 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-16 13:59:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590181275] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:48,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2025-03-16 13:59:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445630421] [2025-03-16 13:59:48,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:48,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 13:59:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:48,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 13:59:48,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:59:48,737 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:49,605 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2025-03-16 13:59:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 13:59:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:59:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:49,605 INFO L225 Difference]: With dead ends: 120 [2025-03-16 13:59:49,606 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 13:59:49,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=4162, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 13:59:49,606 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:49,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 91 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:59:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 13:59:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2025-03-16 13:59:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2025-03-16 13:59:49,625 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 51 [2025-03-16 13:59:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:49,625 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2025-03-16 13:59:49,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2025-03-16 13:59:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:59:49,628 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:49,628 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:49,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:49,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-16 13:59:49,829 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:49,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 823352461, now seen corresponding path program 5 times [2025-03-16 13:59:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62664350] [2025-03-16 13:59:49,829 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:49,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:49,854 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:49,854 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:49,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 13:59:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62664350] [2025-03-16 13:59:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62664350] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217254635] [2025-03-16 13:59:50,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:50,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:50,148 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) [2025-03-16 13:59:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 13:59:50,234 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 7 equivalence classes. [2025-03-16 13:59:50,453 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:59:50,453 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:59:50,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:50,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 13:59:50,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:50,471 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 9 treesize of output 3 [2025-03-16 13:59:50,497 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 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:50,535 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2025-03-16 13:59:50,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-16 13:59:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 13:59:50,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:50,751 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 53 treesize of output 47 [2025-03-16 13:59:50,762 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2025-03-16 13:59:50,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 114 [2025-03-16 13:59:50,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2025-03-16 13:59:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-16 13:59:50,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217254635] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:50,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 27 [2025-03-16 13:59:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131153251] [2025-03-16 13:59:50,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:50,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 13:59:50,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:50,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 13:59:50,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:59:50,796 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:51,100 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2025-03-16 13:59:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:59:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:59:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:51,101 INFO L225 Difference]: With dead ends: 90 [2025-03-16 13:59:51,101 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 13:59:51,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2025-03-16 13:59:51,102 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:51,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:59:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 13:59:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2025-03-16 13:59:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 79 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2025-03-16 13:59:51,120 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 51 [2025-03-16 13:59:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:51,120 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2025-03-16 13:59:51,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2025-03-16 13:59:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 13:59:51,120 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:51,120 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:51,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 13:59:51,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-16 13:59:51,321 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:51,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash -786807594, now seen corresponding path program 3 times [2025-03-16 13:59:51,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:51,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671874832] [2025-03-16 13:59:51,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:51,328 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 8 equivalence classes. [2025-03-16 13:59:51,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 51 of 54 statements. [2025-03-16 13:59:51,347 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:59:51,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 109 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:59:51,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:51,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671874832] [2025-03-16 13:59:51,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671874832] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:51,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711938561] [2025-03-16 13:59:51,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:59:51,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:51,985 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) [2025-03-16 13:59:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 13:59:52,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 8 equivalence classes. [2025-03-16 13:59:52,148 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 51 of 54 statements. [2025-03-16 13:59:52,148 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:59:52,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:52,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:59:52,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:52,206 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 0 case distinctions, treesize of input 23 treesize of output 13 [2025-03-16 13:59:52,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:52,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2025-03-16 13:59:52,311 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 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-16 13:59:52,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:52,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2025-03-16 13:59:52,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:59:52,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-03-16 13:59:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 40 proven. 85 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 13:59:52,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-16 13:59:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711938561] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:53,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:53,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 17] total 56 [2025-03-16 13:59:53,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772345822] [2025-03-16 13:59:53,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:53,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-16 13:59:53,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:53,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-16 13:59:53,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2826, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:59:53,128 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:57,983 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2025-03-16 13:59:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2025-03-16 13:59:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2025-03-16 13:59:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:57,984 INFO L225 Difference]: With dead ends: 330 [2025-03-16 13:59:57,984 INFO L226 Difference]: Without dead ends: 235 [2025-03-16 13:59:57,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4244, Invalid=17511, Unknown=1, NotChecked=0, Total=21756 [2025-03-16 13:59:57,986 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 259 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 228 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:57,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 111 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2167 Invalid, 3 Unknown, 0 Unchecked, 1.9s Time] [2025-03-16 13:59:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-03-16 13:59:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 175. [2025-03-16 13:59:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2586206896551724) internal successors, (219), 174 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2025-03-16 13:59:58,034 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 54 [2025-03-16 13:59:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:58,034 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2025-03-16 13:59:58,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2025-03-16 13:59:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 13:59:58,035 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:58,035 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:58,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-16 13:59:58,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-16 13:59:58,236 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:58,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 562323791, now seen corresponding path program 4 times [2025-03-16 13:59:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:58,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793463443] [2025-03-16 13:59:58,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:58,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:58,244 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:59:58,249 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 55 statements. [2025-03-16 13:59:58,249 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:58,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 13:59:58,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:59:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793463443] [2025-03-16 13:59:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793463443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:59:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952698445] [2025-03-16 13:59:58,406 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:59:58,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:59:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:59:58,409 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) [2025-03-16 13:59:58,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 13:59:58,509 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:59:58,524 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 55 statements. [2025-03-16 13:59:58,525 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:59:58,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:59:58,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:59:58,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:59:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 13:59:58,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:59:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 13:59:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952698445] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:59:58,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:59:58,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-03-16 13:59:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189607617] [2025-03-16 13:59:58,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:59:58,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:59:58,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:59:58,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:59:58,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:59:58,769 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:59:58,992 INFO L93 Difference]: Finished difference Result 280 states and 352 transitions. [2025-03-16 13:59:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 13:59:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2025-03-16 13:59:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:59:58,993 INFO L225 Difference]: With dead ends: 280 [2025-03-16 13:59:58,993 INFO L226 Difference]: Without dead ends: 228 [2025-03-16 13:59:58,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:59:58,995 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:59:58,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 27 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:59:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-16 13:59:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 175. [2025-03-16 13:59:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2701149425287357) internal successors, (221), 174 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 221 transitions. [2025-03-16 13:59:59,057 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 221 transitions. Word has length 55 [2025-03-16 13:59:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:59:59,057 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 221 transitions. [2025-03-16 13:59:59,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:59:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 221 transitions. [2025-03-16 13:59:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 13:59:59,057 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:59:59,057 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:59:59,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-16 13:59:59,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-16 13:59:59,258 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:59:59,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:59:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash -209391724, now seen corresponding path program 5 times [2025-03-16 13:59:59,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:59:59,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724525697] [2025-03-16 13:59:59,259 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:59:59,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:59:59,266 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 8 equivalence classes. [2025-03-16 13:59:59,278 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 13:59:59,278 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 13:59:59,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 43 proven. 82 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-16 14:00:00,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724525697] [2025-03-16 14:00:00,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724525697] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20434868] [2025-03-16 14:00:00,309 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 14:00:00,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:00,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:00,310 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) [2025-03-16 14:00:00,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 14:00:00,398 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 58 statements into 8 equivalence classes. [2025-03-16 14:00:03,301 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:00:03,302 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 14:00:03,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:03,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-16 14:00:03,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:03,312 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 11 treesize of output 7 [2025-03-16 14:00:03,425 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 13 treesize of output 9 [2025-03-16 14:00:03,461 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-16 14:00:03,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2025-03-16 14:00:03,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:03,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2025-03-16 14:00:03,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:03,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 14:00:03,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:03,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 14:00:03,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:03,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 14:00:03,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:03,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2025-03-16 14:00:03,729 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 9 treesize of output 3 [2025-03-16 14:00:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-16 14:00:03,752 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:04,020 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-16 14:00:04,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2025-03-16 14:00:04,319 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 23 treesize of output 21 [2025-03-16 14:00:04,321 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 42 treesize of output 38 [2025-03-16 14:00:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:00:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20434868] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:04,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:04,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 20] total 52 [2025-03-16 14:00:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146413000] [2025-03-16 14:00:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:04,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-16 14:00:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:04,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-16 14:00:04,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2468, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 14:00:04,470 INFO L87 Difference]: Start difference. First operand 175 states and 221 transitions. Second operand has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:05,107 INFO L93 Difference]: Finished difference Result 322 states and 413 transitions. [2025-03-16 14:00:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 14:00:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-16 14:00:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:05,108 INFO L225 Difference]: With dead ends: 322 [2025-03-16 14:00:05,108 INFO L226 Difference]: Without dead ends: 189 [2025-03-16 14:00:05,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=3260, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 14:00:05,109 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:05,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 121 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:00:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-03-16 14:00:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 175. [2025-03-16 14:00:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2025-03-16 14:00:05,161 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 58 [2025-03-16 14:00:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:05,161 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2025-03-16 14:00:05,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2025-03-16 14:00:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:00:05,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:05,162 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:05,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-16 14:00:05,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:05,362 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:05,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash -220707851, now seen corresponding path program 6 times [2025-03-16 14:00:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:05,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225367983] [2025-03-16 14:00:05,363 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:00:05,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:05,373 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 8 equivalence classes. [2025-03-16 14:00:05,395 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 58 statements. [2025-03-16 14:00:05,395 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 14:00:05,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 14:00:05,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225367983] [2025-03-16 14:00:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225367983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:05,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795628969] [2025-03-16 14:00:05,696 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:00:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:05,698 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) [2025-03-16 14:00:05,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-16 14:00:05,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 8 equivalence classes. [2025-03-16 14:00:06,094 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 58 statements. [2025-03-16 14:00:06,094 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 14:00:06,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:06,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 14:00:06,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:06,109 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 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-16 14:00:06,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:06,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2025-03-16 14:00:06,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:06,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-03-16 14:00:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 14:00:06,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2025-03-16 14:00:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795628969] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:06,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 20 [2025-03-16 14:00:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251203903] [2025-03-16 14:00:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:06,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 14:00:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:06,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 14:00:06,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:00:06,280 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:06,685 INFO L93 Difference]: Finished difference Result 314 states and 388 transitions. [2025-03-16 14:00:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 14:00:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-16 14:00:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:06,686 INFO L225 Difference]: With dead ends: 314 [2025-03-16 14:00:06,686 INFO L226 Difference]: Without dead ends: 311 [2025-03-16 14:00:06,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:00:06,686 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:06,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:00:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2025-03-16 14:00:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2025-03-16 14:00:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.2633587786259541) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2025-03-16 14:00:06,759 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 58 [2025-03-16 14:00:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:06,759 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2025-03-16 14:00:06,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2025-03-16 14:00:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:00:06,760 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:06,760 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:06,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-16 14:00:06,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:06,960 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:06,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2132861610, now seen corresponding path program 6 times [2025-03-16 14:00:06,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293665634] [2025-03-16 14:00:06,961 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:00:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:06,970 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 9 equivalence classes. [2025-03-16 14:00:06,986 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:00:06,986 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 14:00:06,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 51 proven. 111 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:00:07,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:07,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293665634] [2025-03-16 14:00:07,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293665634] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224382752] [2025-03-16 14:00:07,205 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 14:00:07,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:07,207 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) [2025-03-16 14:00:07,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-16 14:00:07,309 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 61 statements into 9 equivalence classes. [2025-03-16 14:00:07,825 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:00:07,825 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 14:00:07,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:07,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:00:07,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:00:07,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:00:08,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224382752] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:08,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:08,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-16 14:00:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271441895] [2025-03-16 14:00:08,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:08,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 14:00:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:08,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 14:00:08,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-16 14:00:08,092 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:08,622 INFO L93 Difference]: Finished difference Result 498 states and 622 transitions. [2025-03-16 14:00:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 14:00:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-16 14:00:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:08,624 INFO L225 Difference]: With dead ends: 498 [2025-03-16 14:00:08,624 INFO L226 Difference]: Without dead ends: 456 [2025-03-16 14:00:08,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 14:00:08,624 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:08,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 31 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 14:00:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2025-03-16 14:00:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 296. [2025-03-16 14:00:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.2542372881355932) internal successors, (370), 295 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 370 transitions. [2025-03-16 14:00:08,719 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 370 transitions. Word has length 61 [2025-03-16 14:00:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:08,719 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 370 transitions. [2025-03-16 14:00:08,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:08,719 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 370 transitions. [2025-03-16 14:00:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:00:08,720 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:08,720 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:08,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-16 14:00:08,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-16 14:00:08,920 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:08,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash 605678766, now seen corresponding path program 7 times [2025-03-16 14:00:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522472132] [2025-03-16 14:00:08,921 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 14:00:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:08,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:00:08,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:00:08,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:00:08,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 14:00:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522472132] [2025-03-16 14:00:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522472132] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040558132] [2025-03-16 14:00:09,130 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 14:00:09,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:09,135 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:00:09,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-16 14:00:09,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:00:09,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:00:09,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:00:09,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:09,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:00:09,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 14:00:09,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-16 14:00:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040558132] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:09,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-16 14:00:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601943565] [2025-03-16 14:00:09,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:09,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 14:00:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:09,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 14:00:09,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-16 14:00:09,624 INFO L87 Difference]: Start difference. First operand 296 states and 370 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:09,958 INFO L93 Difference]: Finished difference Result 693 states and 873 transitions. [2025-03-16 14:00:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 14:00:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-16 14:00:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:09,960 INFO L225 Difference]: With dead ends: 693 [2025-03-16 14:00:09,960 INFO L226 Difference]: Without dead ends: 394 [2025-03-16 14:00:09,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 14:00:09,961 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 176 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:09,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 31 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:00:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2025-03-16 14:00:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 279. [2025-03-16 14:00:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2661870503597121) internal successors, (352), 278 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 352 transitions. [2025-03-16 14:00:10,057 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 352 transitions. Word has length 61 [2025-03-16 14:00:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:10,058 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 352 transitions. [2025-03-16 14:00:10,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 352 transitions. [2025-03-16 14:00:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 14:00:10,058 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:10,058 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:10,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-03-16 14:00:10,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:10,259 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:10,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:10,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1748199246, now seen corresponding path program 7 times [2025-03-16 14:00:10,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:10,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386453522] [2025-03-16 14:00:10,259 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 14:00:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:10,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 14:00:10,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:00:10,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:00:10,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 21 proven. 107 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 14:00:10,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386453522] [2025-03-16 14:00:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386453522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662888732] [2025-03-16 14:00:10,951 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 14:00:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:10,953 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:00:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-16 14:00:11,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 14:00:11,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:00:11,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:00:11,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:11,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-16 14:00:11,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:11,224 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 11 treesize of output 7 [2025-03-16 14:00:11,246 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 [2025-03-16 14:00:11,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:11,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 14:00:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 33 proven. 93 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-03-16 14:00:11,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:11,707 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 24 treesize of output 22 [2025-03-16 14:00:11,708 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 42 treesize of output 38 [2025-03-16 14:00:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 33 proven. 93 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-03-16 14:00:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662888732] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:11,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 55 [2025-03-16 14:00:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734116862] [2025-03-16 14:00:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:11,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 14:00:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:11,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 14:00:11,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 14:00:11,820 INFO L87 Difference]: Start difference. First operand 279 states and 352 transitions. Second operand has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 55 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:12,633 INFO L93 Difference]: Finished difference Result 566 states and 721 transitions. [2025-03-16 14:00:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 14:00:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 55 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2025-03-16 14:00:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:12,635 INFO L225 Difference]: With dead ends: 566 [2025-03-16 14:00:12,635 INFO L226 Difference]: Without dead ends: 333 [2025-03-16 14:00:12,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=580, Invalid=4676, Unknown=0, NotChecked=0, Total=5256 [2025-03-16 14:00:12,636 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:12,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 65 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:00:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2025-03-16 14:00:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 279. [2025-03-16 14:00:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2625899280575539) internal successors, (351), 278 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 351 transitions. [2025-03-16 14:00:12,720 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 351 transitions. Word has length 65 [2025-03-16 14:00:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:12,720 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 351 transitions. [2025-03-16 14:00:12,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 55 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 351 transitions. [2025-03-16 14:00:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 14:00:12,721 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:12,721 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:12,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-03-16 14:00:12,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:12,922 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:12,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash 392114479, now seen corresponding path program 8 times [2025-03-16 14:00:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:12,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814410592] [2025-03-16 14:00:12,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:00:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:12,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 65 statements into 2 equivalence classes. [2025-03-16 14:00:12,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:00:12,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:00:12,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 167 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:00:13,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814410592] [2025-03-16 14:00:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814410592] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:13,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515205509] [2025-03-16 14:00:13,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:00:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:13,745 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:00:13,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-16 14:00:13,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 65 statements into 2 equivalence classes. [2025-03-16 14:00:13,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:00:13,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:00:13,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:13,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 14:00:13,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:14,104 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 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 14:00:14,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 14:00:14,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:14,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2025-03-16 14:00:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 14:00:14,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 14:00:14,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2025-03-16 14:00:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 47 proven. 160 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:00:14,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:29,866 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 53 treesize of output 47 [2025-03-16 14:00:29,882 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2025-03-16 14:00:29,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 114 [2025-03-16 14:00:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 130 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-16 14:00:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515205509] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:29,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 20] total 53 [2025-03-16 14:00:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680603523] [2025-03-16 14:00:29,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:29,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-16 14:00:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:29,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-16 14:00:29,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2473, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 14:00:29,904 INFO L87 Difference]: Start difference. First operand 279 states and 351 transitions. Second operand has 53 states, 53 states have (on average 2.660377358490566) internal successors, (141), 53 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:31,069 INFO L93 Difference]: Finished difference Result 396 states and 504 transitions. [2025-03-16 14:00:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-16 14:00:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.660377358490566) internal successors, (141), 53 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2025-03-16 14:00:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:31,071 INFO L225 Difference]: With dead ends: 396 [2025-03-16 14:00:31,071 INFO L226 Difference]: Without dead ends: 323 [2025-03-16 14:00:31,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=777, Invalid=6029, Unknown=0, NotChecked=0, Total=6806 [2025-03-16 14:00:31,072 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 162 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:31,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 96 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 14:00:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2025-03-16 14:00:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 291. [2025-03-16 14:00:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.2379310344827585) internal successors, (359), 290 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 359 transitions. [2025-03-16 14:00:31,176 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 359 transitions. Word has length 65 [2025-03-16 14:00:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:31,176 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 359 transitions. [2025-03-16 14:00:31,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.660377358490566) internal successors, (141), 53 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 359 transitions. [2025-03-16 14:00:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-16 14:00:31,177 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:31,177 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:31,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-16 14:00:31,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-16 14:00:31,378 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:31,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1749930026, now seen corresponding path program 8 times [2025-03-16 14:00:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77739560] [2025-03-16 14:00:31,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:00:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:31,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-03-16 14:00:31,393 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 14:00:31,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:00:31,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 14:00:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77739560] [2025-03-16 14:00:31,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77739560] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616192104] [2025-03-16 14:00:31,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:00:31,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:31,584 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:00:31,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-16 14:00:31,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-03-16 14:00:31,732 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 14:00:31,732 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:00:31,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:31,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 14:00:31,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:00:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 14:00:31,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:00:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-16 14:00:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616192104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:00:32,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:00:32,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2025-03-16 14:00:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516771479] [2025-03-16 14:00:32,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:00:32,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 14:00:32,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:00:32,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 14:00:32,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2025-03-16 14:00:32,109 INFO L87 Difference]: Start difference. First operand 291 states and 359 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:00:32,484 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2025-03-16 14:00:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 14:00:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-03-16 14:00:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:00:32,486 INFO L225 Difference]: With dead ends: 746 [2025-03-16 14:00:32,486 INFO L226 Difference]: Without dead ends: 429 [2025-03-16 14:00:32,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 14:00:32,486 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:00:32,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 33 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:00:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2025-03-16 14:00:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 295. [2025-03-16 14:00:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.2380952380952381) internal successors, (364), 294 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 364 transitions. [2025-03-16 14:00:32,577 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 364 transitions. Word has length 68 [2025-03-16 14:00:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:00:32,577 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 364 transitions. [2025-03-16 14:00:32,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:00:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 364 transitions. [2025-03-16 14:00:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:00:32,577 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:00:32,577 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:00:32,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-03-16 14:00:32,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-16 14:00:32,778 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:00:32,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:00:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 987284397, now seen corresponding path program 9 times [2025-03-16 14:00:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:00:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609123050] [2025-03-16 14:00:32,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:00:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:00:32,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 69 statements into 10 equivalence classes. [2025-03-16 14:00:32,812 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 66 of 69 statements. [2025-03-16 14:00:32,812 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 14:00:32,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2025-03-16 14:00:33,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:00:33,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609123050] [2025-03-16 14:00:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609123050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:00:33,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334245168] [2025-03-16 14:00:33,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:00:33,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:00:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:00:33,003 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:00:33,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-16 14:00:33,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 69 statements into 10 equivalence classes. [2025-03-16 14:00:33,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 66 of 69 statements. [2025-03-16 14:00:33,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 14:00:33,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:00:33,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 14:00:33,594 INFO L279 TraceCheckSpWp]: Computing forward predicates...