./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --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-examples/sorting_bubblesort_ground-1.i -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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:18:32,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:18:32,750 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:18:32,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:18:32,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:18:32,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:18:32,774 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:18:32,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:18:32,774 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:18:32,774 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:18:32,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:18:32,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:18:32,776 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:18:32,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:18:32,776 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:18:32,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:32,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:18:32,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:18:32,777 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 -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2025-03-16 13:18:33,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:18:33,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:18:33,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:18:33,023 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:18:33,023 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:18:33,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2025-03-16 13:18:34,137 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e09e1/68824806e175412590f8fd3debbd3647/FLAGbe761a31c [2025-03-16 13:18:34,418 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:18:34,419 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2025-03-16 13:18:34,428 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e09e1/68824806e175412590f8fd3debbd3647/FLAGbe761a31c [2025-03-16 13:18:34,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e09e1/68824806e175412590f8fd3debbd3647 [2025-03-16 13:18:34,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:18:34,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:18:34,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:34,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:18:34,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:18:34,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dce2437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34, skipping insertion in model container [2025-03-16 13:18:34,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:18:34,834 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-examples/sorting_bubblesort_ground-1.i[820,833] [2025-03-16 13:18:34,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:34,859 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:18:34,867 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-examples/sorting_bubblesort_ground-1.i[820,833] [2025-03-16 13:18:34,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:34,887 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:18:34,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34 WrapperNode [2025-03-16 13:18:34,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:34,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:34,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:18:34,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:18:34,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,910 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2025-03-16 13:18:34,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:34,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:18:34,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:18:34,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:18:34,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,918 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,931 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-16 13:18:34,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,936 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:18:34,947 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:18:34,947 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:18:34,947 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:18:34,948 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (1/1) ... [2025-03-16 13:18:34,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:34,981 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 13:18:34,988 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 13:18:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:18:35,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:18:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:18:35,065 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:18:35,066 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:18:35,180 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:18:35,187 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:18:35,187 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:18:35,193 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:18:35,194 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:18:35,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:35 BoogieIcfgContainer [2025-03-16 13:18:35,194 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:18:35,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:18:35,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:18:35,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:18:35,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:18:34" (1/3) ... [2025-03-16 13:18:35,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cefba44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:35, skipping insertion in model container [2025-03-16 13:18:35,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:34" (2/3) ... [2025-03-16 13:18:35,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cefba44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:35, skipping insertion in model container [2025-03-16 13:18:35,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:35" (3/3) ... [2025-03-16 13:18:35,203 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2025-03-16 13:18:35,214 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:18:35,216 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_bubblesort_ground-1.i that has 1 procedures, 15 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-16 13:18:35,260 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:18:35,271 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;@1b707af7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:18:35,271 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:18:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 13:18:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 13:18:35,279 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,279 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,280 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:35,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -539075157, now seen corresponding path program 1 times [2025-03-16 13:18:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:35,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030532121] [2025-03-16 13:18:35,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:35,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:18:35,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:18:35,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,429 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 13:18:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:35,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030532121] [2025-03-16 13:18:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030532121] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:35,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:18:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175929973] [2025-03-16 13:18:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:35,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:35,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:35,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:35,450 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:35,464 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2025-03-16 13:18:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 13:18:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:35,469 INFO L225 Difference]: With dead ends: 29 [2025-03-16 13:18:35,470 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:18:35,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:35,473 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:35,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:18:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:18:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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 13:18:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2025-03-16 13:18:35,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 7 [2025-03-16 13:18:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:35,492 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2025-03-16 13:18:35,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2025-03-16 13:18:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:18:35,492 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,492 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:18:35,493 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:35,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1557402327, now seen corresponding path program 1 times [2025-03-16 13:18:35,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:35,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515907176] [2025-03-16 13:18:35,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:35,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:18:35,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:18:35,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:35,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515907176] [2025-03-16 13:18:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515907176] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713854783] [2025-03-16 13:18:35,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:35,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:35,589 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 13:18:35,590 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 13:18:35,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:18:35,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:18:35,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 13:18:35,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:35,680 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:18:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713854783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:35,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:18:35,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2025-03-16 13:18:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668375019] [2025-03-16 13:18:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:35,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:35,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:35,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:35,683 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:35,695 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2025-03-16 13:18:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:18:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:35,698 INFO L225 Difference]: With dead ends: 23 [2025-03-16 13:18:35,698 INFO L226 Difference]: Without dead ends: 17 [2025-03-16 13:18:35,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:35,699 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:35,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-16 13:18:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-16 13:18:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 13:18:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2025-03-16 13:18:35,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 8 [2025-03-16 13:18:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:35,704 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2025-03-16 13:18:35,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2025-03-16 13:18:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 13:18:35,705 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:35,705 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:35,711 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 13:18:35,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:35,906 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:35,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1190697412, now seen corresponding path program 1 times [2025-03-16 13:18:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766519723] [2025-03-16 13:18:35,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:35,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 13:18:35,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 13:18:35,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:35,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766519723] [2025-03-16 13:18:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766519723] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683134557] [2025-03-16 13:18:35,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:35,979 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 13:18:35,981 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 13:18:36,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 13:18:36,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 13:18:36,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 13:18:36,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:36,045 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:18:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683134557] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:36,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:18:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2025-03-16 13:18:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639613262] [2025-03-16 13:18:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:36,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:36,046 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 13:18:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,064 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2025-03-16 13:18:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2025-03-16 13:18:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,066 INFO L225 Difference]: With dead ends: 35 [2025-03-16 13:18:36,066 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 13:18:36,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:36,067 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 13:18:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2025-03-16 13:18:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) 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 13:18:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2025-03-16 13:18:36,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2025-03-16 13:18:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,072 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2025-03-16 13:18:36,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 13:18:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2025-03-16 13:18:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 13:18:36,073 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,073 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,080 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 13:18:36,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 13:18:36,274 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1733025427, now seen corresponding path program 1 times [2025-03-16 13:18:36,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206889457] [2025-03-16 13:18:36,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:36,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 13:18:36,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:18:36,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206889457] [2025-03-16 13:18:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206889457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556534608] [2025-03-16 13:18:36,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:36,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:36,333 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 13:18:36,334 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 13:18:36,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 13:18:36,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:18:36,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:36,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:18:36,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556534608] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:36,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:36,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 13:18:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209887065] [2025-03-16 13:18:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 13:18:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 13:18:36,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:36,432 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,448 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2025-03-16 13:18:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:18:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-16 13:18:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,449 INFO L225 Difference]: With dead ends: 36 [2025-03-16 13:18:36,449 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 13:18:36,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:36,449 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 13:18:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-16 13:18:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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 13:18:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2025-03-16 13:18:36,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 13 [2025-03-16 13:18:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,457 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2025-03-16 13:18:36,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2025-03-16 13:18:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:18:36,458 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,458 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,464 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 13:18:36,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:36,659 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:36,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1147957273, now seen corresponding path program 2 times [2025-03-16 13:18:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:36,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062723208] [2025-03-16 13:18:36,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:36,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 13:18:36,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:18:36,687 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:36,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062723208] [2025-03-16 13:18:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062723208] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907741961] [2025-03-16 13:18:36,737 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:36,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:36,739 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 13:18:36,741 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 13:18:36,769 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 13:18:36,782 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:18:36,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:36,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:36,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:18:36,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:18:36,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907741961] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:36,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:36,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2025-03-16 13:18:36,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792252510] [2025-03-16 13:18:36,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:36,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:18:36,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:36,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:18:36,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:18:36,890 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 13:18:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:36,922 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2025-03-16 13:18:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:18:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 16 [2025-03-16 13:18:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:36,923 INFO L225 Difference]: With dead ends: 51 [2025-03-16 13:18:36,923 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:18:36,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:18:36,924 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:36,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 77 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:18:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2025-03-16 13:18:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2025-03-16 13:18:36,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2025-03-16 13:18:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:36,927 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2025-03-16 13:18:36,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 13:18:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2025-03-16 13:18:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 13:18:36,928 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:36,928 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:36,934 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 13:18:37,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,132 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:37,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:37,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1396178672, now seen corresponding path program 3 times [2025-03-16 13:18:37,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:37,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178226856] [2025-03-16 13:18:37,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:37,159 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-03-16 13:18:37,184 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 25 statements. [2025-03-16 13:18:37,184 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:18:37,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:37,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178226856] [2025-03-16 13:18:37,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178226856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:37,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283477249] [2025-03-16 13:18:37,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:37,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:37,249 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 13:18:37,251 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 13:18:37,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-03-16 13:18:37,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 25 statements. [2025-03-16 13:18:37,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:18:37,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:18:37,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283477249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:37,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:37,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-16 13:18:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983444410] [2025-03-16 13:18:37,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:37,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 13:18:37,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:37,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 13:18:37,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 13:18:37,363 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 13:18:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:37,401 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2025-03-16 13:18:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:18:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 25 [2025-03-16 13:18:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:37,404 INFO L225 Difference]: With dead ends: 76 [2025-03-16 13:18:37,404 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 13:18:37,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 13:18:37,405 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:37,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 13:18:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-03-16 13:18:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2025-03-16 13:18:37,414 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 25 [2025-03-16 13:18:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:37,414 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2025-03-16 13:18:37,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 13:18:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2025-03-16 13:18:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:18:37,416 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:37,416 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:37,422 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 13:18:37,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,617 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:37,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1448547760, now seen corresponding path program 4 times [2025-03-16 13:18:37,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:37,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685120545] [2025-03-16 13:18:37,618 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:37,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:37,638 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:18:37,652 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:18:37,656 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:37,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685120545] [2025-03-16 13:18:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685120545] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752163260] [2025-03-16 13:18:37,769 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:37,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:37,772 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 13:18:37,773 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 13:18:37,812 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:18:37,832 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:18:37,832 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:37,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:37,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:18:37,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:37,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752163260] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:37,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:37,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-16 13:18:37,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632844485] [2025-03-16 13:18:37,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:37,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:18:37,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:37,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:18:37,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:18:37,964 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:38,049 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2025-03-16 13:18:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:18:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 13:18:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:38,054 INFO L225 Difference]: With dead ends: 148 [2025-03-16 13:18:38,054 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 13:18:38,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:18:38,055 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:38,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 13:18:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2025-03-16 13:18:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 103 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 13:18:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2025-03-16 13:18:38,062 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 37 [2025-03-16 13:18:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:38,062 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2025-03-16 13:18:38,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2025-03-16 13:18:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 13:18:38,063 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:38,063 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:38,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:18:38,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:38,264 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:38,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1757471536, now seen corresponding path program 5 times [2025-03-16 13:18:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:38,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379431912] [2025-03-16 13:18:38,264 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:38,289 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 61 statements into 16 equivalence classes. [2025-03-16 13:18:38,357 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 54 of 61 statements. [2025-03-16 13:18:38,357 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 13:18:38,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379431912] [2025-03-16 13:18:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379431912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633409752] [2025-03-16 13:18:38,625 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:38,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:38,627 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 13:18:38,629 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 13:18:38,670 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 61 statements into 16 equivalence classes. [2025-03-16 13:18:38,730 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 54 of 61 statements. [2025-03-16 13:18:38,730 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 13:18:38,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:38,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:18:38,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:38,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:18:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633409752] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:39,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-16 13:18:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806136300] [2025-03-16 13:18:39,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:39,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 13:18:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:39,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 13:18:39,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:18:39,126 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:39,243 INFO L93 Difference]: Finished difference Result 292 states and 419 transitions. [2025-03-16 13:18:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:18:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2025-03-16 13:18:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:39,244 INFO L225 Difference]: With dead ends: 292 [2025-03-16 13:18:39,244 INFO L226 Difference]: Without dead ends: 200 [2025-03-16 13:18:39,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:18:39,245 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:39,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 93 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-03-16 13:18:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2025-03-16 13:18:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3266331658291457) internal successors, (264), 199 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 13:18:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 264 transitions. [2025-03-16 13:18:39,256 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 264 transitions. Word has length 61 [2025-03-16 13:18:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:39,256 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 264 transitions. [2025-03-16 13:18:39,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 264 transitions. [2025-03-16 13:18:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-03-16 13:18:39,259 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:39,259 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:39,266 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 13:18:39,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:39,460 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:39,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 126025264, now seen corresponding path program 6 times [2025-03-16 13:18:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:39,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127609361] [2025-03-16 13:18:39,460 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:18:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:39,479 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 109 statements into 32 equivalence classes. [2025-03-16 13:18:39,495 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 30 of 109 statements. [2025-03-16 13:18:39,495 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:18:39,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2025-03-16 13:18:39,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:39,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127609361] [2025-03-16 13:18:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127609361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:39,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973997492] [2025-03-16 13:18:39,803 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:18:39,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:39,806 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 13:18:39,807 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 13:18:39,856 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 109 statements into 32 equivalence classes. [2025-03-16 13:18:39,876 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 30 of 109 statements. [2025-03-16 13:18:39,876 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:18:39,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:39,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 13:18:39,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:40,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:18:40,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-16 13:18:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2025-03-16 13:18:40,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:40,501 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2025-03-16 13:18:40,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2025-03-16 13:18:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2025-03-16 13:18:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973997492] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:40,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2025-03-16 13:18:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513282888] [2025-03-16 13:18:40,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:40,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:18:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:40,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:18:40,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-16 13:18:40,538 INFO L87 Difference]: Start difference. First operand 200 states and 264 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 13:18:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:40,721 INFO L93 Difference]: Finished difference Result 486 states and 646 transitions. [2025-03-16 13:18:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:18:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 109 [2025-03-16 13:18:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:40,725 INFO L225 Difference]: With dead ends: 486 [2025-03-16 13:18:40,725 INFO L226 Difference]: Without dead ends: 298 [2025-03-16 13:18:40,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:40,728 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:40,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 87 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-03-16 13:18:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 292. [2025-03-16 13:18:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3230240549828178) internal successors, (385), 291 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 13:18:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2025-03-16 13:18:40,752 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 109 [2025-03-16 13:18:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:40,753 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2025-03-16 13:18:40,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 13:18:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2025-03-16 13:18:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-03-16 13:18:40,758 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:40,758 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:40,765 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 13:18:40,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 13:18:40,959 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:40,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash 618096924, now seen corresponding path program 1 times [2025-03-16 13:18:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:40,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128370861] [2025-03-16 13:18:40,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:40,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:40,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-16 13:18:40,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-16 13:18:40,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:40,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1393 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:41,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:41,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128370861] [2025-03-16 13:18:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128370861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402762848] [2025-03-16 13:18:41,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:41,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:41,191 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 13:18:41,193 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 13:18:41,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-16 13:18:41,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-16 13:18:41,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:41,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:41,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:18:41,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1393 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:41,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1393 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:41,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402762848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:41,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:41,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 13:18:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207608865] [2025-03-16 13:18:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:41,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:18:41,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:41,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:18:41,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:41,480 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 13:18:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:41,507 INFO L93 Difference]: Finished difference Result 584 states and 781 transitions. [2025-03-16 13:18:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:18:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 112 [2025-03-16 13:18:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:41,509 INFO L225 Difference]: With dead ends: 584 [2025-03-16 13:18:41,509 INFO L226 Difference]: Without dead ends: 304 [2025-03-16 13:18:41,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:41,510 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:41,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2025-03-16 13:18:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2025-03-16 13:18:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.3102310231023102) internal successors, (397), 303 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 13:18:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 397 transitions. [2025-03-16 13:18:41,540 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 397 transitions. Word has length 112 [2025-03-16 13:18:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:41,540 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 397 transitions. [2025-03-16 13:18:41,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 13:18:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 397 transitions. [2025-03-16 13:18:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-16 13:18:41,541 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:41,542 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:41,549 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 13:18:41,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:18:41,742 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:41,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash 259475484, now seen corresponding path program 2 times [2025-03-16 13:18:41,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:41,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670061235] [2025-03-16 13:18:41,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:41,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:41,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-16 13:18:41,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 13:18:41,772 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:41,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:42,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670061235] [2025-03-16 13:18:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670061235] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314065228] [2025-03-16 13:18:42,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:42,310 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 13:18:42,312 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 13:18:42,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-16 13:18:42,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-16 13:18:42,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:42,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:18:42,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:42,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2025-03-16 13:18:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314065228] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:43,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:43,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-16 13:18:43,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126289111] [2025-03-16 13:18:43,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:43,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-16 13:18:43,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:43,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-16 13:18:43,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:18:43,049 INFO L87 Difference]: Start difference. First operand 304 states and 397 transitions. Second operand has 48 states, 48 states have (on average 1.25) internal successors, (60), 47 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 13:18:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:43,091 INFO L93 Difference]: Finished difference Result 608 states and 817 transitions. [2025-03-16 13:18:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:18:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 47 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 124 [2025-03-16 13:18:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:43,094 INFO L225 Difference]: With dead ends: 608 [2025-03-16 13:18:43,094 INFO L226 Difference]: Without dead ends: 328 [2025-03-16 13:18:43,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:18:43,097 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:43,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2025-03-16 13:18:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2025-03-16 13:18:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.2874617737003058) internal successors, (421), 327 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 13:18:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 421 transitions. [2025-03-16 13:18:43,123 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 421 transitions. Word has length 124 [2025-03-16 13:18:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:43,123 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 421 transitions. [2025-03-16 13:18:43,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 47 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 13:18:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 421 transitions. [2025-03-16 13:18:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-16 13:18:43,125 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:43,125 INFO L218 NwaCegarLoop]: trace histogram [46, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:43,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:18:43,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 13:18:43,330 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:43,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash -151812580, now seen corresponding path program 3 times [2025-03-16 13:18:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603622074] [2025-03-16 13:18:43,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:43,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 32 equivalence classes. [2025-03-16 13:18:43,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 39 of 148 statements. [2025-03-16 13:18:43,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:18:43,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 2271 trivial. 0 not checked. [2025-03-16 13:18:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603622074] [2025-03-16 13:18:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603622074] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761052779] [2025-03-16 13:18:43,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:43,812 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 13:18:43,813 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 13:18:43,889 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 32 equivalence classes. [2025-03-16 13:18:43,936 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 39 of 148 statements. [2025-03-16 13:18:43,936 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:18:43,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 13:18:43,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:44,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:18:44,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2025-03-16 13:18:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 2271 trivial. 0 not checked. [2025-03-16 13:18:44,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:44,899 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2025-03-16 13:18:44,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2025-03-16 13:18:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 2271 trivial. 0 not checked. [2025-03-16 13:18:44,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761052779] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:44,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2025-03-16 13:18:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602656338] [2025-03-16 13:18:44,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:44,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 13:18:44,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:44,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 13:18:44,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2025-03-16 13:18:44,928 INFO L87 Difference]: Start difference. First operand 328 states and 421 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 13:18:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:45,192 INFO L93 Difference]: Finished difference Result 346 states and 444 transitions. [2025-03-16 13:18:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:18:45,193 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2025-03-16 13:18:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:45,195 INFO L225 Difference]: With dead ends: 346 [2025-03-16 13:18:45,197 INFO L226 Difference]: Without dead ends: 340 [2025-03-16 13:18:45,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:18:45,198 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:45,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 100 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:18:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2025-03-16 13:18:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 331. [2025-03-16 13:18:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.284848484848485) internal successors, (424), 330 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 13:18:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 424 transitions. [2025-03-16 13:18:45,211 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 424 transitions. Word has length 148 [2025-03-16 13:18:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:45,211 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 424 transitions. [2025-03-16 13:18:45,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 13:18:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 424 transitions. [2025-03-16 13:18:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2025-03-16 13:18:45,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:45,212 INFO L218 NwaCegarLoop]: trace histogram [46, 30, 30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:45,219 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 13:18:45,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:18:45,413 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:45,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash -47134288, now seen corresponding path program 4 times [2025-03-16 13:18:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230509459] [2025-03-16 13:18:45,414 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:45,446 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 151 statements into 2 equivalence classes. [2025-03-16 13:18:45,459 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 151 of 151 statements. [2025-03-16 13:18:45,459 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:45,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:18:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230509459] [2025-03-16 13:18:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230509459] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844074232] [2025-03-16 13:18:46,220 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:46,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:46,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:46,222 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 13:18:46,222 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 13:18:46,314 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 151 statements into 2 equivalence classes. [2025-03-16 13:18:46,371 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 151 of 151 statements. [2025-03-16 13:18:46,371 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:46,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:46,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 13:18:46,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:18:46,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:18:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844074232] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:47,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2025-03-16 13:18:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358335860] [2025-03-16 13:18:47,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:47,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 13:18:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:47,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 13:18:47,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 13:18:47,357 INFO L87 Difference]: Start difference. First operand 331 states and 424 transitions. Second operand has 64 states, 64 states have (on average 3.03125) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 13:18:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:47,656 INFO L93 Difference]: Finished difference Result 902 states and 1279 transitions. [2025-03-16 13:18:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-16 13:18:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.03125) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 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 151 [2025-03-16 13:18:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:47,660 INFO L225 Difference]: With dead ends: 902 [2025-03-16 13:18:47,660 INFO L226 Difference]: Without dead ends: 619 [2025-03-16 13:18:47,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 13:18:47,663 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 220 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:47,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 145 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:18:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2025-03-16 13:18:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2025-03-16 13:18:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.307443365695793) internal successors, (808), 618 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 13:18:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 808 transitions. [2025-03-16 13:18:47,688 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 808 transitions. Word has length 151 [2025-03-16 13:18:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:47,688 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 808 transitions. [2025-03-16 13:18:47,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.03125) internal successors, (194), 64 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 13:18:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 808 transitions. [2025-03-16 13:18:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2025-03-16 13:18:47,690 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:47,691 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:47,698 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 13:18:47,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:18:47,891 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:47,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash 185237424, now seen corresponding path program 5 times [2025-03-16 13:18:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890178732] [2025-03-16 13:18:47,892 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:47,912 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 247 statements into 64 equivalence classes. [2025-03-16 13:18:48,950 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 240 of 247 statements. [2025-03-16 13:18:48,951 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-16 13:18:48,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:18:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890178732] [2025-03-16 13:18:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890178732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826945191] [2025-03-16 13:18:51,181 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:51,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:51,183 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 13:18:51,192 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 13:18:51,302 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 247 statements into 64 equivalence classes. [2025-03-16 13:19:16,533 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 240 of 247 statements. [2025-03-16 13:19:16,534 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-16 13:19:16,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:16,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-16 13:19:16,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:19:16,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:19:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2025-03-16 13:19:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826945191] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:19:19,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:19:19,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 128 [2025-03-16 13:19:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985578852] [2025-03-16 13:19:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:19:19,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2025-03-16 13:19:19,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:19:19,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2025-03-16 13:19:19,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2025-03-16 13:19:19,814 INFO L87 Difference]: Start difference. First operand 619 states and 808 transitions. Second operand has 128 states, 128 states have (on average 3.015625) internal successors, (386), 128 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 13:19:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:19:21,032 INFO L93 Difference]: Finished difference Result 1766 states and 2527 transitions. [2025-03-16 13:19:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2025-03-16 13:19:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.015625) internal successors, (386), 128 states have internal predecessors, (386), 0 states have call successors, (0), 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 247 [2025-03-16 13:19:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:19:21,039 INFO L225 Difference]: With dead ends: 1766 [2025-03-16 13:19:21,039 INFO L226 Difference]: Without dead ends: 1195 [2025-03-16 13:19:21,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2025-03-16 13:19:21,042 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 486 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:19:21,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 209 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:19:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2025-03-16 13:19:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2025-03-16 13:19:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.3199329983249581) internal successors, (1576), 1194 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 13:19:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1576 transitions. [2025-03-16 13:19:21,076 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1576 transitions. Word has length 247 [2025-03-16 13:19:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:19:21,076 INFO L471 AbstractCegarLoop]: Abstraction has 1195 states and 1576 transitions. [2025-03-16 13:19:21,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.015625) internal successors, (386), 128 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 13:19:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1576 transitions. [2025-03-16 13:19:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2025-03-16 13:19:21,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:19:21,080 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:19:21,102 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 13:19:21,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:19:21,281 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:19:21,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:19:21,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2141580208, now seen corresponding path program 6 times [2025-03-16 13:19:21,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:19:21,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068922799] [2025-03-16 13:19:21,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:19:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:19:21,311 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 439 statements into 128 equivalence classes. [2025-03-16 13:19:21,390 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 84 of 439 statements. [2025-03-16 13:19:21,390 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 13:19:21,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24840 backedges. 1 proven. 1003 refuted. 0 times theorem prover too weak. 23836 trivial. 0 not checked. [2025-03-16 13:19:21,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:19:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068922799] [2025-03-16 13:19:21,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068922799] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:19:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635353546] [2025-03-16 13:19:21,955 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:19:21,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:21,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:19:21,959 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 13:19:21,961 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 13:19:22,085 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 439 statements into 128 equivalence classes. [2025-03-16 13:19:22,717 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 84 of 439 statements. [2025-03-16 13:19:22,717 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 13:19:22,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:22,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-16 13:19:22,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:23,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:19:23,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2025-03-16 13:19:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24840 backedges. 0 proven. 1004 refuted. 0 times theorem prover too weak. 23836 trivial. 0 not checked. [2025-03-16 13:19:23,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:19:25,042 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2025-03-16 13:19:25,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2025-03-16 13:19:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24840 backedges. 124 proven. 880 refuted. 0 times theorem prover too weak. 23836 trivial. 0 not checked. [2025-03-16 13:19:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635353546] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:19:25,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:19:25,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2025-03-16 13:19:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168415175] [2025-03-16 13:19:25,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:19:25,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 13:19:25,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:19:25,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 13:19:25,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 13:19:25,076 INFO L87 Difference]: Start difference. First operand 1195 states and 1576 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:19:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:19:25,749 INFO L93 Difference]: Finished difference Result 1596 states and 2110 transitions. [2025-03-16 13:19:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-16 13:19:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 439 [2025-03-16 13:19:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:19:25,755 INFO L225 Difference]: With dead ends: 1596 [2025-03-16 13:19:25,755 INFO L226 Difference]: Without dead ends: 1590 [2025-03-16 13:19:25,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 858 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 13:19:25,758 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:19:25,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 219 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:19:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2025-03-16 13:19:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1198. [2025-03-16 13:19:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.3191311612364245) internal successors, (1579), 1197 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 13:19:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1579 transitions. [2025-03-16 13:19:25,794 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1579 transitions. Word has length 439 [2025-03-16 13:19:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:19:25,795 INFO L471 AbstractCegarLoop]: Abstraction has 1198 states and 1579 transitions. [2025-03-16 13:19:25,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:19:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1579 transitions. [2025-03-16 13:19:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2025-03-16 13:19:25,799 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:19:25,799 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:19:25,808 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 13:19:26,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:26,000 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:19:26,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:19:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1922331748, now seen corresponding path program 7 times [2025-03-16 13:19:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:19:26,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73577669] [2025-03-16 13:19:26,001 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:19:26,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:19:26,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 442 statements into 1 equivalence classes. [2025-03-16 13:19:26,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 442 of 442 statements. [2025-03-16 13:19:26,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:19:26,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24848 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:19:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73577669] [2025-03-16 13:19:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73577669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:19:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034888586] [2025-03-16 13:19:27,848 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:19:27,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:19:27,850 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 13:19:27,852 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 13:19:27,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 442 statements into 1 equivalence classes. [2025-03-16 13:19:28,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 442 of 442 statements. [2025-03-16 13:19:28,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:19:28,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:28,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 13:19:28,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24848 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:28,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:19:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24848 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034888586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:19:29,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:19:29,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2025-03-16 13:19:29,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434742115] [2025-03-16 13:19:29,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:19:29,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-16 13:19:29,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:19:29,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-16 13:19:29,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-16 13:19:29,829 INFO L87 Difference]: Start difference. First operand 1198 states and 1579 transitions. Second operand has 96 states, 96 states have (on average 1.125) internal successors, (108), 95 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 13:19:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:19:29,926 INFO L93 Difference]: Finished difference Result 2396 states and 3205 transitions. [2025-03-16 13:19:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-16 13:19:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.125) internal successors, (108), 95 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 442 [2025-03-16 13:19:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:19:29,931 INFO L225 Difference]: With dead ends: 2396 [2025-03-16 13:19:29,931 INFO L226 Difference]: Without dead ends: 1246 [2025-03-16 13:19:29,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-16 13:19:29,937 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:19:29,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:19:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2025-03-16 13:19:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1246. [2025-03-16 13:19:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 1.3068273092369478) internal successors, (1627), 1245 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 13:19:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1627 transitions. [2025-03-16 13:19:29,975 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1627 transitions. Word has length 442 [2025-03-16 13:19:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:19:29,975 INFO L471 AbstractCegarLoop]: Abstraction has 1246 states and 1627 transitions. [2025-03-16 13:19:29,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.125) internal successors, (108), 95 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 13:19:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1627 transitions. [2025-03-16 13:19:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2025-03-16 13:19:29,979 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:19:29,979 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 94, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:19:29,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 13:19:30,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 13:19:30,180 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:19:30,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:19:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 387516316, now seen corresponding path program 8 times [2025-03-16 13:19:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:19:30,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627012718] [2025-03-16 13:19:30,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:19:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:19:30,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 490 statements into 2 equivalence classes. [2025-03-16 13:19:30,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 490 of 490 statements. [2025-03-16 13:19:30,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:19:30,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 28232 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:19:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627012718] [2025-03-16 13:19:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627012718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:19:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063807620] [2025-03-16 13:19:34,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:19:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:19:34,969 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 13:19:34,970 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 13:19:35,135 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 490 statements into 2 equivalence classes. [2025-03-16 13:19:35,269 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 490 of 490 statements. [2025-03-16 13:19:35,269 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:19:35,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:35,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-16 13:19:35,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28232 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:35,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:19:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28232 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2025-03-16 13:19:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063807620] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:19:42,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:19:42,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2025-03-16 13:19:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212663880] [2025-03-16 13:19:42,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:19:42,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2025-03-16 13:19:42,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:19:42,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2025-03-16 13:19:42,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2025-03-16 13:19:42,276 INFO L87 Difference]: Start difference. First operand 1246 states and 1627 transitions. Second operand has 192 states, 192 states have (on average 1.0625) internal successors, (204), 191 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 13:19:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:19:42,466 INFO L93 Difference]: Finished difference Result 2492 states and 3349 transitions. [2025-03-16 13:19:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2025-03-16 13:19:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0625) internal successors, (204), 191 states have internal predecessors, (204), 0 states have call successors, (0), 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 490 [2025-03-16 13:19:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:19:42,471 INFO L225 Difference]: With dead ends: 2492 [2025-03-16 13:19:42,471 INFO L226 Difference]: Without dead ends: 1342 [2025-03-16 13:19:42,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2025-03-16 13:19:42,475 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:19:42,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:19:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2025-03-16 13:19:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1342. [2025-03-16 13:19:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 1.284862043251305) internal successors, (1723), 1341 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states 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 13:19:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1723 transitions. [2025-03-16 13:19:42,512 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1723 transitions. Word has length 490 [2025-03-16 13:19:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:19:42,513 INFO L471 AbstractCegarLoop]: Abstraction has 1342 states and 1723 transitions. [2025-03-16 13:19:42,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0625) internal successors, (204), 191 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 13:19:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1723 transitions. [2025-03-16 13:19:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2025-03-16 13:19:42,516 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:19:42,516 INFO L218 NwaCegarLoop]: trace histogram [190, 126, 126, 126, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:19:42,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:19:42,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:19:42,717 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:19:42,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:19:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1002700900, now seen corresponding path program 9 times [2025-03-16 13:19:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:19:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237072012] [2025-03-16 13:19:42,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:19:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:19:42,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 586 statements into 128 equivalence classes. [2025-03-16 13:19:42,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 75 of 586 statements. [2025-03-16 13:19:42,841 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-16 13:19:42,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41912 backedges. 1 proven. 1379 refuted. 0 times theorem prover too weak. 40532 trivial. 0 not checked. [2025-03-16 13:19:43,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:19:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237072012] [2025-03-16 13:19:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237072012] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:19:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439458330] [2025-03-16 13:19:43,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:19:43,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:19:43,547 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 13:19:43,550 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 13:19:43,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 586 statements into 128 equivalence classes. [2025-03-16 13:19:45,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 75 of 586 statements. [2025-03-16 13:19:45,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-16 13:19:45,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:45,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-16 13:19:45,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:46,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:19:46,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2025-03-16 13:19:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41912 backedges. 1 proven. 1379 refuted. 0 times theorem prover too weak. 40532 trivial. 0 not checked. [2025-03-16 13:19:46,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:19:47,676 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2025-03-16 13:19:47,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2025-03-16 13:19:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 41912 backedges. 123 proven. 1257 refuted. 0 times theorem prover too weak. 40532 trivial. 0 not checked. [2025-03-16 13:19:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439458330] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:19:47,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:19:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 47 [2025-03-16 13:19:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474784315] [2025-03-16 13:19:47,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:19:47,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-16 13:19:47,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:19:47,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-16 13:19:47,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 13:19:47,744 INFO L87 Difference]: Start difference. First operand 1342 states and 1723 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 47 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 13:19:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:19:49,628 INFO L93 Difference]: Finished difference Result 2531 states and 3308 transitions. [2025-03-16 13:19:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-03-16 13:19:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 47 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 586 [2025-03-16 13:19:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:19:49,639 INFO L225 Difference]: With dead ends: 2531 [2025-03-16 13:19:49,639 INFO L226 Difference]: Without dead ends: 2525 [2025-03-16 13:19:49,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1262 GetRequests, 1145 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1095, Invalid=12477, Unknown=0, NotChecked=0, Total=13572 [2025-03-16 13:19:49,641 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 157 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:19:49,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 162 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:19:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2025-03-16 13:19:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1345. [2025-03-16 13:19:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.2842261904761905) internal successors, (1726), 1344 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states 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 13:19:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1726 transitions. [2025-03-16 13:19:49,689 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1726 transitions. Word has length 586 [2025-03-16 13:19:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:19:49,689 INFO L471 AbstractCegarLoop]: Abstraction has 1345 states and 1726 transitions. [2025-03-16 13:19:49,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 47 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 13:19:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1726 transitions. [2025-03-16 13:19:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2025-03-16 13:19:49,693 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:19:49,693 INFO L218 NwaCegarLoop]: trace histogram [190, 126, 126, 126, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:19:49,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 13:19:49,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:19:49,893 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:19:49,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:19:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 35905584, now seen corresponding path program 10 times [2025-03-16 13:19:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:19:49,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998927150] [2025-03-16 13:19:49,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:19:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:19:49,953 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 589 statements into 2 equivalence classes. [2025-03-16 13:19:49,997 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 589 of 589 statements. [2025-03-16 13:19:49,997 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:19:49,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41923 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 18171 trivial. 0 not checked. [2025-03-16 13:19:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:19:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998927150] [2025-03-16 13:19:58,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998927150] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:19:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693392764] [2025-03-16 13:19:58,631 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:19:58,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:19:58,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:19:58,633 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 13:19:58,634 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 13:19:58,901 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 589 statements into 2 equivalence classes. [2025-03-16 13:19:59,105 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 589 of 589 statements. [2025-03-16 13:19:59,105 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:19:59,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:19:59,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-03-16 13:19:59,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:19:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41923 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 18171 trivial. 0 not checked. [2025-03-16 13:19:59,404 INFO L312 TraceCheckSpWp]: Computing backward predicates...