./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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-industry-pattern/array_shadowinit.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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:10:41,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:10:41,082 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:10:41,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:10:41,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:10:41,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:10:41,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:10:41,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:10:41,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:10:41,109 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:10:41,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:10:41,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:10:41,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:10:41,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:10:41,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:10:41,111 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:10:41,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:10:41,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:10:41,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:10:41,112 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 -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2025-03-03 09:10:41,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:10:41,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:10:41,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:10:41,315 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:10:41,315 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:10:41,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2025-03-03 09:10:42,442 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc89478/02675947ddf343e6bc7f17859cafa71d/FLAG0ae140856 [2025-03-03 09:10:42,663 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:10:42,664 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2025-03-03 09:10:42,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc89478/02675947ddf343e6bc7f17859cafa71d/FLAG0ae140856 [2025-03-03 09:10:42,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc89478/02675947ddf343e6bc7f17859cafa71d [2025-03-03 09:10:42,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:10:42,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:10:42,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:10:42,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:10:42,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:10:42,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30296b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42, skipping insertion in model container [2025-03-03 09:10:42,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,725 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:10:42,820 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-industry-pattern/array_shadowinit.i[809,822] [2025-03-03 09:10:42,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:10:42,840 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:10:42,847 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-industry-pattern/array_shadowinit.i[809,822] [2025-03-03 09:10:42,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:10:42,864 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:10:42,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42 WrapperNode [2025-03-03 09:10:42,865 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:10:42,866 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:10:42,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:10:42,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:10:42,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,891 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2025-03-03 09:10:42,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:10:42,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:10:42,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:10:42,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:10:42,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,899 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,911 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-03 09:10:42,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,919 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:10:42,922 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:10:42,922 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:10:42,922 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:10:42,923 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (1/1) ... [2025-03-03 09:10:42,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:10:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:42,954 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) [2025-03-03 09:10:42,959 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 [2025-03-03 09:10:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:10:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:10:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:10:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:10:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:10:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:10:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:10:42,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:10:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:10:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:10:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:10:43,023 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:10:43,025 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:10:43,138 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 09:10:43,138 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:10:43,146 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:10:43,147 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:10:43,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:10:43 BoogieIcfgContainer [2025-03-03 09:10:43,148 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:10:43,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:10:43,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:10:43,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:10:43,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:10:42" (1/3) ... [2025-03-03 09:10:43,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798a89fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:10:43, skipping insertion in model container [2025-03-03 09:10:43,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:10:42" (2/3) ... [2025-03-03 09:10:43,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798a89fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:10:43, skipping insertion in model container [2025-03-03 09:10:43,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:10:43" (3/3) ... [2025-03-03 09:10:43,157 INFO L128 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2025-03-03 09:10:43,168 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:10:43,170 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_shadowinit.i that has 1 procedures, 13 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 09:10:43,212 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:10:43,222 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;@237a8392, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:10:43,222 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:10:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-03 09:10:43,230 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:43,231 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:43,231 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:43,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1712306486, now seen corresponding path program 1 times [2025-03-03 09:10:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504208152] [2025-03-03 09:10:43,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:10:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:43,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-03 09:10:43,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-03 09:10:43,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:43,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504208152] [2025-03-03 09:10:43,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504208152] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:10:43,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:10:43,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:10:43,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572672249] [2025-03-03 09:10:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:10:43,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:10:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:43,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:10:43,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:10:43,463 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:43,495 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2025-03-03 09:10:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:10:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-03 09:10:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:43,500 INFO L225 Difference]: With dead ends: 23 [2025-03-03 09:10:43,501 INFO L226 Difference]: Without dead ends: 10 [2025-03-03 09:10:43,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:10:43,504 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:43,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:10:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-03-03 09:10:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-03-03 09:10:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2025-03-03 09:10:43,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2025-03-03 09:10:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:43,532 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2025-03-03 09:10:43,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2025-03-03 09:10:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 09:10:43,533 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:43,533 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:43,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:10:43,534 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:43,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:43,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1540938243, now seen corresponding path program 1 times [2025-03-03 09:10:43,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:43,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462926628] [2025-03-03 09:10:43,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:10:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:43,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:10:43,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:10:43,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:43,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:43,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:43,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462926628] [2025-03-03 09:10:43,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462926628] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:43,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037572373] [2025-03-03 09:10:43,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:10:43,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:43,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:43,872 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) [2025-03-03 09:10:43,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:10:43,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:10:43,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:10:43,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:43,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:43,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 09:10:43,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:43,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:10:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:44,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:44,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-03 09:10:44,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-03 09:10:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037572373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:44,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-03 09:10:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141305779] [2025-03-03 09:10:44,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:44,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:10:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:44,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:10:44,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:10:44,083 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:44,137 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2025-03-03 09:10:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:10:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 09:10:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:44,137 INFO L225 Difference]: With dead ends: 15 [2025-03-03 09:10:44,137 INFO L226 Difference]: Without dead ends: 13 [2025-03-03 09:10:44,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:10:44,138 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:44,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:10:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-03 09:10:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-03-03 09:10:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2025-03-03 09:10:44,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2025-03-03 09:10:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:44,143 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2025-03-03 09:10:44,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2025-03-03 09:10:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 09:10:44,145 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:44,145 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:44,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:10:44,345 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 [2025-03-03 09:10:44,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:44,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1479864754, now seen corresponding path program 1 times [2025-03-03 09:10:44,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:44,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649435430] [2025-03-03 09:10:44,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:10:44,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:44,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:10:44,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:10:44,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:44,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:44,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:44,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649435430] [2025-03-03 09:10:44,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649435430] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:44,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238307654] [2025-03-03 09:10:44,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:10:44,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:44,455 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) [2025-03-03 09:10:44,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:10:44,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:10:44,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:10:44,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:44,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:44,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:10:44,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:44,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238307654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:44,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:44,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-03 09:10:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506619299] [2025-03-03 09:10:44,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:44,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:10:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:44,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:10:44,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:10:44,591 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:44,629 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2025-03-03 09:10:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:10:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-03 09:10:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:44,630 INFO L225 Difference]: With dead ends: 28 [2025-03-03 09:10:44,630 INFO L226 Difference]: Without dead ends: 19 [2025-03-03 09:10:44,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:10:44,631 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:44,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:10:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-03 09:10:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2025-03-03 09:10:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2025-03-03 09:10:44,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2025-03-03 09:10:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:44,633 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2025-03-03 09:10:44,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2025-03-03 09:10:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:10:44,633 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:44,633 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:44,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:10:44,838 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 [2025-03-03 09:10:44,838 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:44,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash -263644159, now seen corresponding path program 2 times [2025-03-03 09:10:44,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:44,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930090440] [2025-03-03 09:10:44,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:10:44,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:44,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-03 09:10:44,862 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:10:44,862 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:10:44,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930090440] [2025-03-03 09:10:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930090440] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692844629] [2025-03-03 09:10:45,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:10:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:45,132 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) [2025-03-03 09:10:45,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:10:45,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-03 09:10:45,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:10:45,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:10:45,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:45,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-03 09:10:45,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:45,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:10:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:45,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:45,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692844629] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:45,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:45,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-03 09:10:45,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748495576] [2025-03-03 09:10:45,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:45,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 09:10:45,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:45,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 09:10:45,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:10:45,396 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:45,553 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2025-03-03 09:10:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:10:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-03 09:10:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:45,554 INFO L225 Difference]: With dead ends: 28 [2025-03-03 09:10:45,554 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 09:10:45,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2025-03-03 09:10:45,555 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:45,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:10:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 09:10:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2025-03-03 09:10:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2025-03-03 09:10:45,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2025-03-03 09:10:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:45,558 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2025-03-03 09:10:45,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2025-03-03 09:10:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-03 09:10:45,559 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:45,559 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:45,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 09:10:45,762 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 [2025-03-03 09:10:45,762 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:45,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1272916426, now seen corresponding path program 3 times [2025-03-03 09:10:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466295372] [2025-03-03 09:10:45,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:10:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:45,768 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-03-03 09:10:45,780 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 09:10:45,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:10:45,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466295372] [2025-03-03 09:10:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466295372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637036280] [2025-03-03 09:10:45,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:10:45,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:45,849 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) [2025-03-03 09:10:45,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:10:45,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-03-03 09:10:45,887 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 09:10:45,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:10:45,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:45,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:10:45,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637036280] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:45,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-03-03 09:10:45,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865930358] [2025-03-03 09:10:45,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:45,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:10:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:45,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:10:45,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:10:45,999 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:46,047 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2025-03-03 09:10:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:10:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-03 09:10:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:46,047 INFO L225 Difference]: With dead ends: 35 [2025-03-03 09:10:46,048 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 09:10:46,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2025-03-03 09:10:46,048 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:46,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:10:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 09:10:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2025-03-03 09:10:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2025-03-03 09:10:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-03-03 09:10:46,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2025-03-03 09:10:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:46,051 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-03-03 09:10:46,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-03-03 09:10:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 09:10:46,052 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:46,052 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:46,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:10:46,252 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 [2025-03-03 09:10:46,252 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:46,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -429316611, now seen corresponding path program 4 times [2025-03-03 09:10:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:46,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520861265] [2025-03-03 09:10:46,253 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:10:46,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:46,258 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-03 09:10:46,270 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 09:10:46,271 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:10:46,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520861265] [2025-03-03 09:10:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520861265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067037766] [2025-03-03 09:10:46,436 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:10:46,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:46,438 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) [2025-03-03 09:10:46,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:10:46,468 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-03 09:10:46,482 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 09:10:46,482 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:10:46,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:46,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 09:10:46,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:46,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:10:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:46,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:46,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:46,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067037766] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:46,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:46,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2025-03-03 09:10:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967654695] [2025-03-03 09:10:46,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:46,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:10:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:46,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:10:46,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:10:46,653 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:46,725 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2025-03-03 09:10:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 09:10:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-03 09:10:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:46,726 INFO L225 Difference]: With dead ends: 23 [2025-03-03 09:10:46,726 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:10:46,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-03-03 09:10:46,727 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:46,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:10:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:10:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2025-03-03 09:10:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2025-03-03 09:10:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-03-03 09:10:46,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2025-03-03 09:10:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:46,734 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-03-03 09:10:46,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-03-03 09:10:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 09:10:46,734 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:46,734 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:46,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:10:46,935 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 [2025-03-03 09:10:46,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:46,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 642321998, now seen corresponding path program 5 times [2025-03-03 09:10:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838494856] [2025-03-03 09:10:46,936 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:10:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:46,942 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 4 equivalence classes. [2025-03-03 09:10:46,952 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 09:10:46,952 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 09:10:46,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838494856] [2025-03-03 09:10:47,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838494856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590048098] [2025-03-03 09:10:47,032 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:10:47,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:47,035 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) [2025-03-03 09:10:47,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:10:47,065 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 4 equivalence classes. [2025-03-03 09:10:47,078 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 09:10:47,078 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 09:10:47,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:47,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 09:10:47,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:47,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590048098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:47,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2025-03-03 09:10:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40154252] [2025-03-03 09:10:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:47,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:10:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:47,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:10:47,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:10:47,197 INFO L87 Difference]: Start difference. First operand 20 states and 21 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) [2025-03-03 09:10:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:47,253 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2025-03-03 09:10:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:10:47,253 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 19 [2025-03-03 09:10:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:47,264 INFO L225 Difference]: With dead ends: 42 [2025-03-03 09:10:47,265 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 09:10:47,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2025-03-03 09:10:47,266 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:47,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:10:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 09:10:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2025-03-03 09:10:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2025-03-03 09:10:47,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2025-03-03 09:10:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:47,272 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2025-03-03 09:10:47,272 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) [2025-03-03 09:10:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2025-03-03 09:10:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 09:10:47,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:47,273 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:47,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 09:10:47,473 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 [2025-03-03 09:10:47,474 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:47,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 910407937, now seen corresponding path program 6 times [2025-03-03 09:10:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:47,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900472868] [2025-03-03 09:10:47,474 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:10:47,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:47,485 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 4 equivalence classes. [2025-03-03 09:10:47,499 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:10:47,500 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-03 09:10:47,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900472868] [2025-03-03 09:10:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900472868] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950643324] [2025-03-03 09:10:47,825 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:10:47,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:47,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:47,827 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) [2025-03-03 09:10:47,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:10:47,858 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 4 equivalence classes. [2025-03-03 09:10:47,870 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:10:47,871 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-03 09:10:47,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:47,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:10:47,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:47,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:10:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:48,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:48,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:48,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:48,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950643324] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:48,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:48,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-03-03 09:10:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761523782] [2025-03-03 09:10:48,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:48,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 09:10:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:48,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 09:10:48,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2025-03-03 09:10:48,276 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:48,803 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2025-03-03 09:10:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:10:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-03 09:10:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:48,804 INFO L225 Difference]: With dead ends: 51 [2025-03-03 09:10:48,804 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 09:10:48,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=1987, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 09:10:48,805 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:48,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:10:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 09:10:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2025-03-03 09:10:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2025-03-03 09:10:48,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2025-03-03 09:10:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:48,808 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2025-03-03 09:10:48,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2025-03-03 09:10:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 09:10:48,809 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:48,809 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:48,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 09:10:49,009 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 [2025-03-03 09:10:49,010 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:49,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:49,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1150056963, now seen corresponding path program 7 times [2025-03-03 09:10:49,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:49,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915758643] [2025-03-03 09:10:49,010 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:10:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:49,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 09:10:49,030 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:10:49,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:49,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915758643] [2025-03-03 09:10:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915758643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278751178] [2025-03-03 09:10:49,349 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:10:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:49,351 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) [2025-03-03 09:10:49,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:10:49,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 09:10:49,394 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:10:49,394 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:49,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:49,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-03 09:10:49,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:49,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:10:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:49,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:49,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:49,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:49,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278751178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:49,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:49,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2025-03-03 09:10:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69234117] [2025-03-03 09:10:49,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:49,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 09:10:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:49,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 09:10:49,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:10:49,746 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:49,898 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2025-03-03 09:10:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:10:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-03 09:10:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:49,899 INFO L225 Difference]: With dead ends: 31 [2025-03-03 09:10:49,899 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 09:10:49,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2025-03-03 09:10:49,900 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:49,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:10:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 09:10:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2025-03-03 09:10:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2025-03-03 09:10:49,905 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2025-03-03 09:10:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:49,906 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2025-03-03 09:10:49,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2025-03-03 09:10:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-03 09:10:49,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:49,906 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:49,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 09:10:50,111 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 [2025-03-03 09:10:50,111 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:50,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash -391991730, now seen corresponding path program 8 times [2025-03-03 09:10:50,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:50,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057877819] [2025-03-03 09:10:50,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:10:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:50,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-03 09:10:50,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 09:10:50,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:10:50,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057877819] [2025-03-03 09:10:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057877819] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35218850] [2025-03-03 09:10:50,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:10:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:50,265 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) [2025-03-03 09:10:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:10:50,307 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-03 09:10:50,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 09:10:50,323 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:10:50,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:50,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:10:50,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:50,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35218850] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:50,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:50,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-03 09:10:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962009944] [2025-03-03 09:10:50,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:50,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 09:10:50,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:50,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 09:10:50,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:10:50,533 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:50,623 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2025-03-03 09:10:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:10:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-03 09:10:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:50,624 INFO L225 Difference]: With dead ends: 56 [2025-03-03 09:10:50,624 INFO L226 Difference]: Without dead ends: 35 [2025-03-03 09:10:50,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:10:50,625 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:50,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:10:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-03 09:10:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2025-03-03 09:10:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2025-03-03 09:10:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2025-03-03 09:10:50,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2025-03-03 09:10:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:50,632 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2025-03-03 09:10:50,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2025-03-03 09:10:50,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 09:10:50,633 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:50,633 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:50,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 09:10:50,833 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 [2025-03-03 09:10:50,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:50,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2083321345, now seen corresponding path program 9 times [2025-03-03 09:10:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429985993] [2025-03-03 09:10:50,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:10:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:50,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 6 equivalence classes. [2025-03-03 09:10:50,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:10:50,851 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:10:50,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429985993] [2025-03-03 09:10:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429985993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670016616] [2025-03-03 09:10:51,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:10:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:51,164 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) [2025-03-03 09:10:51,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 09:10:51,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 6 equivalence classes. [2025-03-03 09:10:51,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:10:51,244 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:10:51,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:51,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-03 09:10:51,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:51,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:10:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:51,543 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:51,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:51,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:51,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670016616] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:51,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:51,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2025-03-03 09:10:51,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794317043] [2025-03-03 09:10:51,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:51,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:10:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:51,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:10:51,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:10:51,701 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:52,321 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2025-03-03 09:10:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 09:10:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-03 09:10:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:52,321 INFO L225 Difference]: With dead ends: 65 [2025-03-03 09:10:52,321 INFO L226 Difference]: Without dead ends: 39 [2025-03-03 09:10:52,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=3064, Unknown=0, NotChecked=0, Total=3422 [2025-03-03 09:10:52,322 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:52,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:10:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-03 09:10:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2025-03-03 09:10:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2025-03-03 09:10:52,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2025-03-03 09:10:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:52,327 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2025-03-03 09:10:52,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2025-03-03 09:10:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 09:10:52,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:52,327 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:52,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 09:10:52,528 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 [2025-03-03 09:10:52,528 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:52,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 622740989, now seen corresponding path program 10 times [2025-03-03 09:10:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104289350] [2025-03-03 09:10:52,529 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:10:52,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:52,534 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:10:52,546 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:10:52,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:10:52,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:52,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104289350] [2025-03-03 09:10:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104289350] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:52,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676633762] [2025-03-03 09:10:52,812 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:10:52,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:52,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:52,814 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) [2025-03-03 09:10:52,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 09:10:52,866 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:10:52,903 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:10:52,904 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:10:52,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:52,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-03 09:10:52,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:52,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:10:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:53,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:53,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:53,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676633762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:53,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 28 [2025-03-03 09:10:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110830403] [2025-03-03 09:10:53,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:53,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 09:10:53,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:53,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 09:10:53,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2025-03-03 09:10:53,161 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:53,365 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2025-03-03 09:10:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 09:10:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 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 32 [2025-03-03 09:10:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:53,366 INFO L225 Difference]: With dead ends: 39 [2025-03-03 09:10:53,366 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 09:10:53,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2025-03-03 09:10:53,367 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:53,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 165 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:10:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 09:10:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-03-03 09:10:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2025-03-03 09:10:53,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2025-03-03 09:10:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:53,370 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2025-03-03 09:10:53,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2025-03-03 09:10:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:10:53,371 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:53,371 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:53,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 09:10:53,575 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 [2025-03-03 09:10:53,575 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:53,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2113924686, now seen corresponding path program 11 times [2025-03-03 09:10:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:53,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666249188] [2025-03-03 09:10:53,576 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:10:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:53,585 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 8 equivalence classes. [2025-03-03 09:10:53,596 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:10:53,596 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 09:10:53,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:53,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:53,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666249188] [2025-03-03 09:10:53,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666249188] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:53,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835099571] [2025-03-03 09:10:53,784 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:10:53,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:53,786 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) [2025-03-03 09:10:53,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 09:10:53,824 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 8 equivalence classes. [2025-03-03 09:10:53,851 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:10:53,851 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 09:10:53,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:53,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 09:10:53,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:53,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835099571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:54,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:54,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2025-03-03 09:10:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381455589] [2025-03-03 09:10:54,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:54,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 09:10:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:54,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 09:10:54,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2025-03-03 09:10:54,091 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:54,182 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2025-03-03 09:10:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 09:10:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-03 09:10:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:54,183 INFO L225 Difference]: With dead ends: 70 [2025-03-03 09:10:54,184 INFO L226 Difference]: Without dead ends: 43 [2025-03-03 09:10:54,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 09:10:54,184 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:54,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 63 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:10:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-03 09:10:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2025-03-03 09:10:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2025-03-03 09:10:54,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2025-03-03 09:10:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:54,188 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2025-03-03 09:10:54,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2025-03-03 09:10:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 09:10:54,188 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:54,188 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:54,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:10:54,389 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 [2025-03-03 09:10:54,389 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:54,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1909665023, now seen corresponding path program 12 times [2025-03-03 09:10:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:54,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528014095] [2025-03-03 09:10:54,390 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:10:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:54,397 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 8 equivalence classes. [2025-03-03 09:10:54,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 09:10:54,412 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 09:10:54,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528014095] [2025-03-03 09:10:54,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528014095] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:54,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010639839] [2025-03-03 09:10:54,718 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:10:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:54,720 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) [2025-03-03 09:10:54,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 09:10:54,761 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 8 equivalence classes. [2025-03-03 09:10:54,816 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 09:10:54,817 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 09:10:54,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:54,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-03 09:10:54,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:54,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:10:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:55,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:55,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-03 09:10:55,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2025-03-03 09:10:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 61 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010639839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:56,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2025-03-03 09:10:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627037862] [2025-03-03 09:10:56,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:56,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-03 09:10:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:56,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-03 09:10:56,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 09:10:56,115 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 57 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:57,873 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2025-03-03 09:10:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-03 09:10:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 57 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-03-03 09:10:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:57,874 INFO L225 Difference]: With dead ends: 69 [2025-03-03 09:10:57,874 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 09:10:57,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=758, Invalid=6045, Unknown=3, NotChecked=0, Total=6806 [2025-03-03 09:10:57,875 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 95 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:57,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 149 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:10:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 09:10:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2025-03-03 09:10:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2025-03-03 09:10:57,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2025-03-03 09:10:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:57,884 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2025-03-03 09:10:57,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 57 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2025-03-03 09:10:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-03 09:10:57,885 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:57,885 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:57,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 09:10:58,090 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 [2025-03-03 09:10:58,090 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:10:58,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:10:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1019124227, now seen corresponding path program 13 times [2025-03-03 09:10:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:10:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712830896] [2025-03-03 09:10:58,091 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:10:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:10:58,100 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-03 09:10:58,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 09:10:58,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:58,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:10:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712830896] [2025-03-03 09:10:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712830896] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:10:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533084619] [2025-03-03 09:10:58,592 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:10:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:10:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:10:58,594 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) [2025-03-03 09:10:58,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 09:10:58,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-03 09:10:58,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 09:10:58,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:10:58,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:10:58,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 09:10:58,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:10:58,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:10:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:58,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:10:59,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:10:59,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:10:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:10:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533084619] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:10:59,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:10:59,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2025-03-03 09:10:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417632757] [2025-03-03 09:10:59,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:10:59,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 09:10:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:10:59,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 09:10:59,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2299, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:10:59,499 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:10:59,849 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2025-03-03 09:10:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 09:10:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-03-03 09:10:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:10:59,850 INFO L225 Difference]: With dead ends: 47 [2025-03-03 09:10:59,850 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 09:10:59,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=2390, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 09:10:59,851 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:10:59,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 341 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:10:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 09:10:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2025-03-03 09:10:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2025-03-03 09:10:59,858 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2025-03-03 09:10:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:10:59,858 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2025-03-03 09:10:59,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:10:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2025-03-03 09:10:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 09:10:59,859 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:10:59,859 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2025-03-03 09:10:59,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 09:11:00,064 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 [2025-03-03 09:11:00,064 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:00,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash 394841678, now seen corresponding path program 14 times [2025-03-03 09:11:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:00,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238423541] [2025-03-03 09:11:00,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:00,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:00,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-03 09:11:00,078 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:11:00,079 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:00,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:00,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:00,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238423541] [2025-03-03 09:11:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238423541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:00,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928661027] [2025-03-03 09:11:00,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:00,290 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) [2025-03-03 09:11:00,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 09:11:00,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-03 09:11:00,356 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:11:00,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:00,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:00,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 09:11:00,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:00,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:00,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928661027] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:00,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:00,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2025-03-03 09:11:00,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28821399] [2025-03-03 09:11:00,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:00,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 09:11:00,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:00,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 09:11:00,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 09:11:00,734 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:00,856 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2025-03-03 09:11:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 09:11:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-03 09:11:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:00,857 INFO L225 Difference]: With dead ends: 84 [2025-03-03 09:11:00,857 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 09:11:00,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 09:11:00,858 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:00,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 87 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 09:11:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2025-03-03 09:11:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2025-03-03 09:11:00,863 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2025-03-03 09:11:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:00,863 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2025-03-03 09:11:00,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2025-03-03 09:11:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 09:11:00,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:00,863 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:00,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 09:11:01,063 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 [2025-03-03 09:11:01,064 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:01,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash -630501375, now seen corresponding path program 15 times [2025-03-03 09:11:01,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:01,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044687567] [2025-03-03 09:11:01,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:01,070 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 10 equivalence classes. [2025-03-03 09:11:01,088 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 09:11:01,088 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 09:11:01,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 84 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044687567] [2025-03-03 09:11:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044687567] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268577513] [2025-03-03 09:11:01,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:01,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:01,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:01,586 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) [2025-03-03 09:11:01,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 09:11:01,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 10 equivalence classes. [2025-03-03 09:11:01,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 09:11:01,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 09:11:01,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:01,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 09:11:01,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:02,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:02,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:02,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:02,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268577513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:02,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:02,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2025-03-03 09:11:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973035749] [2025-03-03 09:11:02,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:02,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-03 09:11:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:02,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-03 09:11:02,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:11:02,666 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:03,640 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2025-03-03 09:11:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-03 09:11:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-03 09:11:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:03,641 INFO L225 Difference]: With dead ends: 93 [2025-03-03 09:11:03,641 INFO L226 Difference]: Without dead ends: 55 [2025-03-03 09:11:03,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=576, Invalid=6396, Unknown=0, NotChecked=0, Total=6972 [2025-03-03 09:11:03,643 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:03,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 374 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:11:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-03 09:11:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2025-03-03 09:11:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2025-03-03 09:11:03,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2025-03-03 09:11:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:03,648 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2025-03-03 09:11:03,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2025-03-03 09:11:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-03 09:11:03,649 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:03,649 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:03,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 09:11:03,849 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 [2025-03-03 09:11:03,849 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:03,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:03,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1404364285, now seen corresponding path program 16 times [2025-03-03 09:11:03,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:03,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235028465] [2025-03-03 09:11:03,850 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:03,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:03,856 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-03 09:11:03,875 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:11:03,876 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:03,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:04,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235028465] [2025-03-03 09:11:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235028465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110527531] [2025-03-03 09:11:04,327 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:04,329 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) [2025-03-03 09:11:04,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 09:11:04,377 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-03 09:11:04,452 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:11:04,452 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:04,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:04,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 09:11:04,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:04,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:04,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:04,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:04,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:04,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110527531] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:04,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:04,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2025-03-03 09:11:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578157190] [2025-03-03 09:11:04,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:04,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:11:04,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:04,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:11:04,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:11:04,872 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:05,244 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2025-03-03 09:11:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 09:11:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-03-03 09:11:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:05,245 INFO L225 Difference]: With dead ends: 55 [2025-03-03 09:11:05,245 INFO L226 Difference]: Without dead ends: 53 [2025-03-03 09:11:05,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1379, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:11:05,245 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:05,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:11:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-03 09:11:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2025-03-03 09:11:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2025-03-03 09:11:05,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2025-03-03 09:11:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:05,252 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2025-03-03 09:11:05,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2025-03-03 09:11:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 09:11:05,253 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:05,253 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:05,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 09:11:05,453 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 [2025-03-03 09:11:05,454 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:05,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 140856910, now seen corresponding path program 17 times [2025-03-03 09:11:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645510792] [2025-03-03 09:11:05,454 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:05,461 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 12 equivalence classes. [2025-03-03 09:11:05,472 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:11:05,472 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 09:11:05,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:05,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645510792] [2025-03-03 09:11:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645510792] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045197510] [2025-03-03 09:11:05,761 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:05,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:05,764 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) [2025-03-03 09:11:05,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 09:11:05,820 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 12 equivalence classes. [2025-03-03 09:11:05,899 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:11:05,899 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 09:11:05,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:05,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 09:11:05,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:06,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045197510] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:06,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2025-03-03 09:11:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985448884] [2025-03-03 09:11:06,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:06,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:11:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:06,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:11:06,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:11:06,400 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:06,565 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2025-03-03 09:11:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 09:11:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-03 09:11:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:06,566 INFO L225 Difference]: With dead ends: 98 [2025-03-03 09:11:06,566 INFO L226 Difference]: Without dead ends: 59 [2025-03-03 09:11:06,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 23 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:11:06,567 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:06,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 100 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-03 09:11:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2025-03-03 09:11:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2025-03-03 09:11:06,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2025-03-03 09:11:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:06,573 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2025-03-03 09:11:06,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2025-03-03 09:11:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 09:11:06,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:06,574 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:06,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 09:11:06,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:06,775 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:06,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -250581759, now seen corresponding path program 18 times [2025-03-03 09:11:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-03-03 09:11:06,776 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:06,783 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 12 equivalence classes. [2025-03-03 09:11:06,808 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:11:06,808 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 09:11:06,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-03-03 09:11:07,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860192909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022832071] [2025-03-03 09:11:07,244 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:07,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:07,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:07,246 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:07,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 09:11:07,308 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 12 equivalence classes. [2025-03-03 09:11:07,474 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:11:07,474 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-03 09:11:07,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:07,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 09:11:07,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:07,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:07,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:07,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:07,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022832071] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:07,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:07,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2025-03-03 09:11:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705659608] [2025-03-03 09:11:07,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:07,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 09:11:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:07,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 09:11:07,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 09:11:07,940 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:08,296 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2025-03-03 09:11:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 09:11:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2025-03-03 09:11:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:08,297 INFO L225 Difference]: With dead ends: 59 [2025-03-03 09:11:08,297 INFO L226 Difference]: Without dead ends: 57 [2025-03-03 09:11:08,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 09:11:08,298 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:08,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 438 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:11:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-03 09:11:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2025-03-03 09:11:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2025-03-03 09:11:08,307 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2025-03-03 09:11:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:08,307 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2025-03-03 09:11:08,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2025-03-03 09:11:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 09:11:08,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:08,307 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:08,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 09:11:08,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:08,508 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:08,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -427149110, now seen corresponding path program 19 times [2025-03-03 09:11:08,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:08,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107915362] [2025-03-03 09:11:08,508 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:08,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:08,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 09:11:08,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 09:11:08,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:08,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107915362] [2025-03-03 09:11:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107915362] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15449690] [2025-03-03 09:11:08,818 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:08,820 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:08,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 09:11:08,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 09:11:08,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 09:11:08,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:08,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:08,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:11:08,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:09,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15449690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:09,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:09,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2025-03-03 09:11:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996726633] [2025-03-03 09:11:09,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:09,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-03 09:11:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:09,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-03 09:11:09,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 09:11:09,500 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:09,652 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2025-03-03 09:11:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 09:11:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2025-03-03 09:11:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:09,653 INFO L225 Difference]: With dead ends: 105 [2025-03-03 09:11:09,653 INFO L226 Difference]: Without dead ends: 63 [2025-03-03 09:11:09,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 09:11:09,654 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:09,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 124 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-03 09:11:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2025-03-03 09:11:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2025-03-03 09:11:09,661 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2025-03-03 09:11:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:09,661 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2025-03-03 09:11:09,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2025-03-03 09:11:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-03 09:11:09,662 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:09,662 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:09,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 09:11:09,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-03 09:11:09,866 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:09,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash 844154365, now seen corresponding path program 20 times [2025-03-03 09:11:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:09,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355475097] [2025-03-03 09:11:09,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:09,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:11:09,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:11:09,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:09,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 165 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:10,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:10,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355475097] [2025-03-03 09:11:10,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355475097] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:10,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980399104] [2025-03-03 09:11:10,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:10,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:10,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:10,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 09:11:10,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:11:10,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:11:10,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:10,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:10,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-03 09:11:10,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:11,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:11:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:11,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:12,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:12,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980399104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:12,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2025-03-03 09:11:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176388434] [2025-03-03 09:11:12,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:12,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-03 09:11:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:12,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-03 09:11:12,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=6810, Unknown=0, NotChecked=0, Total=7140 [2025-03-03 09:11:12,451 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:13,667 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2025-03-03 09:11:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-03 09:11:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 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 56 [2025-03-03 09:11:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:13,670 INFO L225 Difference]: With dead ends: 109 [2025-03-03 09:11:13,670 INFO L226 Difference]: Without dead ends: 67 [2025-03-03 09:11:13,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=586, Invalid=9716, Unknown=0, NotChecked=0, Total=10302 [2025-03-03 09:11:13,673 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:13,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 750 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 09:11:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-03 09:11:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2025-03-03 09:11:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2025-03-03 09:11:13,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2025-03-03 09:11:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:13,680 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2025-03-03 09:11:13,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2025-03-03 09:11:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-03 09:11:13,680 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:13,680 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:13,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 09:11:13,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 09:11:13,881 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:13,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash 71576065, now seen corresponding path program 21 times [2025-03-03 09:11:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215496738] [2025-03-03 09:11:13,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:13,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 14 equivalence classes. [2025-03-03 09:11:13,916 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 09:11:13,916 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-03 09:11:13,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 198 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:14,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:14,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215496738] [2025-03-03 09:11:14,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215496738] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:14,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739958553] [2025-03-03 09:11:14,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:14,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:14,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:14,590 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:14,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 09:11:14,662 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 14 equivalence classes. [2025-03-03 09:11:15,057 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 09:11:15,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-03 09:11:15,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:15,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-03 09:11:15,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:15,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:15,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:16,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:16,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739958553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:16,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2025-03-03 09:11:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927850716] [2025-03-03 09:11:16,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:16,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-03-03 09:11:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:16,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-03-03 09:11:16,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5333, Unknown=0, NotChecked=0, Total=5700 [2025-03-03 09:11:16,295 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:17,860 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2025-03-03 09:11:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-03 09:11:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 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 60 [2025-03-03 09:11:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:17,860 INFO L225 Difference]: With dead ends: 121 [2025-03-03 09:11:17,860 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 09:11:17,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=884, Invalid=11548, Unknown=0, NotChecked=0, Total=12432 [2025-03-03 09:11:17,863 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:17,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 715 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 09:11:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 09:11:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2025-03-03 09:11:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2025-03-03 09:11:17,870 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2025-03-03 09:11:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:17,870 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2025-03-03 09:11:17,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2025-03-03 09:11:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 09:11:17,870 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:17,871 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:17,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-03 09:11:18,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:18,071 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:18,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -655555075, now seen corresponding path program 22 times [2025-03-03 09:11:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:18,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460314340] [2025-03-03 09:11:18,072 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:18,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:18,079 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 64 statements into 2 equivalence classes. [2025-03-03 09:11:18,110 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 09:11:18,111 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:18,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:18,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:18,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460314340] [2025-03-03 09:11:18,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460314340] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:18,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432369253] [2025-03-03 09:11:18,813 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:18,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:18,820 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:18,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 09:11:18,898 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 64 statements into 2 equivalence classes. [2025-03-03 09:11:19,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 09:11:19,080 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:19,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:19,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-03 09:11:19,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:19,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:19,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:19,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432369253] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:19,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:19,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 52 [2025-03-03 09:11:19,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861045098] [2025-03-03 09:11:19,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:19,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-03 09:11:19,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:19,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-03 09:11:19,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2514, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 09:11:19,774 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:20,302 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2025-03-03 09:11:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-03 09:11:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2025-03-03 09:11:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:20,303 INFO L225 Difference]: With dead ends: 71 [2025-03-03 09:11:20,303 INFO L226 Difference]: Without dead ends: 69 [2025-03-03 09:11:20,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 09:11:20,304 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:20,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 565 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:11:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-03 09:11:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2025-03-03 09:11:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2025-03-03 09:11:20,316 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2025-03-03 09:11:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:20,316 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2025-03-03 09:11:20,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2025-03-03 09:11:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-03 09:11:20,316 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:20,316 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:20,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 09:11:20,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:20,517 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:20,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -424071602, now seen corresponding path program 23 times [2025-03-03 09:11:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335872842] [2025-03-03 09:11:20,518 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:20,529 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 16 equivalence classes. [2025-03-03 09:11:20,545 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 09:11:20,545 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 09:11:20,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:21,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335872842] [2025-03-03 09:11:21,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335872842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686752832] [2025-03-03 09:11:21,023 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:21,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 09:11:21,110 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 16 equivalence classes. [2025-03-03 09:11:21,259 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 09:11:21,259 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 09:11:21,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:21,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 09:11:21,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:21,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:21,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686752832] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:21,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:21,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2025-03-03 09:11:21,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691812223] [2025-03-03 09:11:21,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:21,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 09:11:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:21,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 09:11:21,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:11:21,902 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:22,090 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2025-03-03 09:11:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-03 09:11:22,090 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 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 67 [2025-03-03 09:11:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:22,091 INFO L225 Difference]: With dead ends: 126 [2025-03-03 09:11:22,091 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 09:11:22,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 87 SyntacticMatches, 31 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2025-03-03 09:11:22,092 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:22,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 126 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 09:11:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2025-03-03 09:11:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2025-03-03 09:11:22,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2025-03-03 09:11:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:22,099 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2025-03-03 09:11:22,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2025-03-03 09:11:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-03 09:11:22,100 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:22,100 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:22,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-03 09:11:22,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-03 09:11:22,301 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:22,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1747879681, now seen corresponding path program 24 times [2025-03-03 09:11:22,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:22,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-03-03 09:11:22,301 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:22,312 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 16 equivalence classes. [2025-03-03 09:11:22,343 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:11:22,343 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 09:11:22,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329116444] [2025-03-03 09:11:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329116444] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741556431] [2025-03-03 09:11:23,083 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:23,085 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:23,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 09:11:23,164 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 16 equivalence classes. [2025-03-03 09:11:23,565 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:11:23,566 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 09:11:23,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:23,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-03 09:11:23,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:23,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:24,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:24,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:24,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741556431] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:24,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 55 [2025-03-03 09:11:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774135791] [2025-03-03 09:11:24,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:24,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 09:11:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:24,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 09:11:24,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2824, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 09:11:24,246 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:24,881 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2025-03-03 09:11:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-03 09:11:24,881 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-03-03 09:11:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:24,882 INFO L225 Difference]: With dead ends: 75 [2025-03-03 09:11:24,882 INFO L226 Difference]: Without dead ends: 73 [2025-03-03 09:11:24,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=2927, Unknown=0, NotChecked=0, Total=3080 [2025-03-03 09:11:24,883 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:24,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 688 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 09:11:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-03-03 09:11:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2025-03-03 09:11:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2025-03-03 09:11:24,891 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2025-03-03 09:11:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:24,891 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2025-03-03 09:11:24,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2025-03-03 09:11:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-03 09:11:24,891 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:24,891 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:24,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-03 09:11:25,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 09:11:25,092 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:25,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1099047222, now seen corresponding path program 25 times [2025-03-03 09:11:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618345376] [2025-03-03 09:11:25,093 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:25,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-03 09:11:25,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 09:11:25,106 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:25,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618345376] [2025-03-03 09:11:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618345376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907013932] [2025-03-03 09:11:25,573 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:25,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:25,576 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:25,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 09:11:25,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-03 09:11:25,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 09:11:25,686 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:25,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:25,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-03 09:11:25,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:26,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907013932] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:26,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2025-03-03 09:11:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616453895] [2025-03-03 09:11:26,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:26,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 09:11:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:26,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 09:11:26,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 09:11:26,400 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 55 states, 55 states have (on average 2.309090909090909) internal successors, (127), 55 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:26,617 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2025-03-03 09:11:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 09:11:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.309090909090909) internal successors, (127), 55 states have internal predecessors, (127), 0 states have call successors, (0), 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 71 [2025-03-03 09:11:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:26,618 INFO L225 Difference]: With dead ends: 133 [2025-03-03 09:11:26,618 INFO L226 Difference]: Without dead ends: 79 [2025-03-03 09:11:26,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 91 SyntacticMatches, 32 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1177, Invalid=3793, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 09:11:26,619 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:26,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 132 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-03 09:11:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2025-03-03 09:11:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2025-03-03 09:11:26,627 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2025-03-03 09:11:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:26,628 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2025-03-03 09:11:26,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.309090909090909) internal successors, (127), 55 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2025-03-03 09:11:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 09:11:26,628 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:26,628 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:26,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 09:11:26,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 09:11:26,829 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:26,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:26,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1600235005, now seen corresponding path program 26 times [2025-03-03 09:11:26,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:26,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911373916] [2025-03-03 09:11:26,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:26,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 09:11:26,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:11:26,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:26,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 315 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:27,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:27,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911373916] [2025-03-03 09:11:27,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911373916] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:27,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752789115] [2025-03-03 09:11:27,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:11:27,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:27,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:27,815 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:27,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 09:11:27,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 09:11:27,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:11:27,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:11:27,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:27,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-03 09:11:27,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:28,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:11:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:29,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:29,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:29,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:30,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752789115] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:30,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 109 [2025-03-03 09:11:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987922104] [2025-03-03 09:11:30,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:30,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2025-03-03 09:11:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:30,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2025-03-03 09:11:30,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=11208, Unknown=0, NotChecked=0, Total=11772 [2025-03-03 09:11:30,429 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 109 states, 109 states have (on average 1.9174311926605505) internal successors, (209), 109 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:32,878 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2025-03-03 09:11:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-03 09:11:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.9174311926605505) internal successors, (209), 109 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-03-03 09:11:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:32,879 INFO L225 Difference]: With dead ends: 142 [2025-03-03 09:11:32,879 INFO L226 Difference]: Without dead ends: 83 [2025-03-03 09:11:32,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1292, Invalid=21660, Unknown=0, NotChecked=0, Total=22952 [2025-03-03 09:11:32,880 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:32,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1134 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 09:11:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-03 09:11:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2025-03-03 09:11:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2025-03-03 09:11:32,889 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2025-03-03 09:11:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:32,889 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2025-03-03 09:11:32,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.9174311926605505) internal successors, (209), 109 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2025-03-03 09:11:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 09:11:32,889 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:32,889 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:32,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 09:11:33,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 09:11:33,090 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:33,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash 318211073, now seen corresponding path program 27 times [2025-03-03 09:11:33,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:33,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693593078] [2025-03-03 09:11:33,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:33,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 18 equivalence classes. [2025-03-03 09:11:33,134 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:11:33,135 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-03 09:11:33,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 360 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693593078] [2025-03-03 09:11:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693593078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829629880] [2025-03-03 09:11:34,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:11:34,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:34,270 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:34,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 09:11:34,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 18 equivalence classes. [2025-03-03 09:11:37,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:11:37,992 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-03 09:11:37,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:37,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 118 conjuncts are in the unsatisfiable core [2025-03-03 09:11:38,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:38,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:39,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:39,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:39,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829629880] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:40,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:40,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 112 [2025-03-03 09:11:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999483817] [2025-03-03 09:11:40,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:40,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2025-03-03 09:11:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:40,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2025-03-03 09:11:40,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=11949, Unknown=0, NotChecked=0, Total=12432 [2025-03-03 09:11:40,546 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 112 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:42,703 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2025-03-03 09:11:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-03 09:11:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 112 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-03-03 09:11:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:42,704 INFO L225 Difference]: With dead ends: 149 [2025-03-03 09:11:42,704 INFO L226 Difference]: Without dead ends: 87 [2025-03-03 09:11:42,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=979, Invalid=18203, Unknown=0, NotChecked=0, Total=19182 [2025-03-03 09:11:42,705 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 3933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:42,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1296 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-03 09:11:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-03 09:11:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2025-03-03 09:11:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2025-03-03 09:11:42,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2025-03-03 09:11:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:42,715 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2025-03-03 09:11:42,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 112 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2025-03-03 09:11:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-03 09:11:42,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:42,715 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:42,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-03 09:11:42,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 09:11:42,916 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:42,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash -75061763, now seen corresponding path program 28 times [2025-03-03 09:11:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:42,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000069995] [2025-03-03 09:11:42,917 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:42,926 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 80 statements into 2 equivalence classes. [2025-03-03 09:11:42,950 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:11:42,950 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:42,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:43,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:43,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000069995] [2025-03-03 09:11:43,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000069995] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:43,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544295376] [2025-03-03 09:11:43,871 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:11:43,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:43,874 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 09:11:43,973 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 80 statements into 2 equivalence classes. [2025-03-03 09:11:44,426 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:11:44,426 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:11:44,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:44,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 93 conjuncts are in the unsatisfiable core [2025-03-03 09:11:44,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:44,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:11:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:45,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:46,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:46,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:46,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544295376] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:46,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:46,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 84 [2025-03-03 09:11:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825343523] [2025-03-03 09:11:46,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:46,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2025-03-03 09:11:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:46,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2025-03-03 09:11:46,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=6722, Unknown=0, NotChecked=0, Total=6972 [2025-03-03 09:11:46,100 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 84 states, 84 states have (on average 1.8928571428571428) internal successors, (159), 84 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:47,175 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2025-03-03 09:11:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-03 09:11:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.8928571428571428) internal successors, (159), 84 states have internal predecessors, (159), 0 states have call successors, (0), 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 80 [2025-03-03 09:11:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:47,176 INFO L225 Difference]: With dead ends: 87 [2025-03-03 09:11:47,176 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 09:11:47,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=258, Invalid=6882, Unknown=0, NotChecked=0, Total=7140 [2025-03-03 09:11:47,176 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 3915 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:47,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1253 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 09:11:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 09:11:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2025-03-03 09:11:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2025-03-03 09:11:47,187 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2025-03-03 09:11:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:47,187 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2025-03-03 09:11:47,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.8928571428571428) internal successors, (159), 84 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2025-03-03 09:11:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 09:11:47,187 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:47,188 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:47,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-03 09:11:47,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:47,388 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:47,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1513852494, now seen corresponding path program 29 times [2025-03-03 09:11:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:47,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255904970] [2025-03-03 09:11:47,388 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:47,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:47,399 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 83 statements into 20 equivalence classes. [2025-03-03 09:11:47,423 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 09:11:47,424 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-03-03 09:11:47,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255904970] [2025-03-03 09:11:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255904970] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438235071] [2025-03-03 09:11:48,004 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:11:48,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:48,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:48,006 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-03 09:11:48,113 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 83 statements into 20 equivalence classes. [2025-03-03 09:11:48,379 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 09:11:48,379 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-03-03 09:11:48,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:48,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-03 09:11:48,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:48,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:49,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438235071] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:49,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:49,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 62 [2025-03-03 09:11:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841870572] [2025-03-03 09:11:49,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:49,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-03 09:11:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:49,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-03 09:11:49,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2025-03-03 09:11:49,332 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:49,610 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2025-03-03 09:11:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-03 09:11:49,611 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 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 83 [2025-03-03 09:11:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:49,611 INFO L225 Difference]: With dead ends: 154 [2025-03-03 09:11:49,611 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 09:11:49,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 107 SyntacticMatches, 39 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1571, Invalid=5071, Unknown=0, NotChecked=0, Total=6642 [2025-03-03 09:11:49,612 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 232 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:49,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 179 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:11:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 09:11:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2025-03-03 09:11:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2025-03-03 09:11:49,623 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2025-03-03 09:11:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:49,623 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2025-03-03 09:11:49,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2025-03-03 09:11:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 09:11:49,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:49,624 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:49,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-03 09:11:49,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-03 09:11:49,824 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:49,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 482812161, now seen corresponding path program 30 times [2025-03-03 09:11:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:49,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207864207] [2025-03-03 09:11:49,825 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:49,834 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 84 statements into 20 equivalence classes. [2025-03-03 09:11:49,862 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:11:49,862 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-03 09:11:49,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 459 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207864207] [2025-03-03 09:11:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207864207] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619321688] [2025-03-03 09:11:51,201 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:11:51,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:51,202 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:51,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-03 09:11:51,318 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 84 statements into 20 equivalence classes. [2025-03-03 09:11:52,513 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:11:52,513 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-03 09:11:52,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:52,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 127 conjuncts are in the unsatisfiable core [2025-03-03 09:11:52,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:53,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:11:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:54,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:11:54,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:11:54,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:11:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619321688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:11:55,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:11:55,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 124 [2025-03-03 09:11:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865810003] [2025-03-03 09:11:55,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:11:55,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2025-03-03 09:11:55,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:11:55,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2025-03-03 09:11:55,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=14697, Unknown=0, NotChecked=0, Total=15252 [2025-03-03 09:11:55,789 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 124 states, 124 states have (on average 1.9596774193548387) internal successors, (243), 124 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:11:58,214 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2025-03-03 09:11:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-03-03 09:11:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9596774193548387) internal successors, (243), 124 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2025-03-03 09:11:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:11:58,215 INFO L225 Difference]: With dead ends: 158 [2025-03-03 09:11:58,215 INFO L226 Difference]: Without dead ends: 95 [2025-03-03 09:11:58,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=976, Invalid=20780, Unknown=0, NotChecked=0, Total=21756 [2025-03-03 09:11:58,216 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 4915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:11:58,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1625 Invalid, 4915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 09:11:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-03 09:11:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2025-03-03 09:11:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2025-03-03 09:11:58,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2025-03-03 09:11:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:11:58,236 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2025-03-03 09:11:58,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9596774193548387) internal successors, (243), 124 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:11:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2025-03-03 09:11:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-03 09:11:58,237 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:11:58,237 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2025-03-03 09:11:58,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-03 09:11:58,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:58,438 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:11:58,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:11:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2127297027, now seen corresponding path program 31 times [2025-03-03 09:11:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:11:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22029279] [2025-03-03 09:11:58,438 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:11:58,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-03 09:11:58,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:11:58,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:58,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:11:59,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:11:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22029279] [2025-03-03 09:11:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22029279] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:11:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521774921] [2025-03-03 09:11:59,696 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:11:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:11:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:11:59,698 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:11:59,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-03 09:11:59,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-03 09:11:59,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:11:59,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:11:59,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:11:59,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 93 conjuncts are in the unsatisfiable core [2025-03-03 09:11:59,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:11:59,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:12:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:00,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:12:01,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-03 09:12:01,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-03 09:12:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521774921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:12:02,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:12:02,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2025-03-03 09:12:02,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40189398] [2025-03-03 09:12:02,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:12:02,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2025-03-03 09:12:02,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:12:02,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2025-03-03 09:12:02,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=11647, Unknown=0, NotChecked=0, Total=11990 [2025-03-03 09:12:02,766 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 110 states, 110 states have (on average 2.109090909090909) internal successors, (232), 110 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:12:04,187 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2025-03-03 09:12:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-03 09:12:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.109090909090909) internal successors, (232), 110 states have internal predecessors, (232), 0 states have call successors, (0), 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 88 [2025-03-03 09:12:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:12:04,188 INFO L225 Difference]: With dead ends: 95 [2025-03-03 09:12:04,188 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 09:12:04,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=352, Invalid=11858, Unknown=0, NotChecked=0, Total=12210 [2025-03-03 09:12:04,189 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 5122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:12:04,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1773 Invalid, 5122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 09:12:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 09:12:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2025-03-03 09:12:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2025-03-03 09:12:04,201 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2025-03-03 09:12:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:12:04,201 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2025-03-03 09:12:04,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.109090909090909) internal successors, (232), 110 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2025-03-03 09:12:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-03 09:12:04,202 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:12:04,202 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2025-03-03 09:12:04,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-03 09:12:04,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:12:04,402 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:12:04,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:12:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2062406066, now seen corresponding path program 32 times [2025-03-03 09:12:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:12:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318103789] [2025-03-03 09:12:04,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:12:04,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:12:04,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-03-03 09:12:04,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 09:12:04,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:12:04,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:12:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:05,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:12:05,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318103789] [2025-03-03 09:12:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318103789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:12:05,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46453944] [2025-03-03 09:12:05,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:12:05,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:12:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:12:05,069 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:12:05,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-03 09:12:05,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-03-03 09:12:05,225 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 09:12:05,225 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:12:05,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:12:05,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 09:12:05,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:12:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:05,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:12:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46453944] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:12:06,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:12:06,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2025-03-03 09:12:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907139781] [2025-03-03 09:12:06,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:12:06,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-03-03 09:12:06,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:12:06,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-03-03 09:12:06,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=3700, Unknown=0, NotChecked=0, Total=4830 [2025-03-03 09:12:06,375 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 70 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:12:06,696 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2025-03-03 09:12:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-03 09:12:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 70 states have internal predecessors, (162), 0 states have call successors, (0), 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 91 [2025-03-03 09:12:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:12:06,697 INFO L225 Difference]: With dead ends: 168 [2025-03-03 09:12:06,697 INFO L226 Difference]: Without dead ends: 99 [2025-03-03 09:12:06,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 116 SyntacticMatches, 42 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3399 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1907, Invalid=6283, Unknown=0, NotChecked=0, Total=8190 [2025-03-03 09:12:06,698 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 236 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:12:06,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 206 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:12:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-03 09:12:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2025-03-03 09:12:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2025-03-03 09:12:06,720 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2025-03-03 09:12:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:12:06,720 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2025-03-03 09:12:06,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 70 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:12:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2025-03-03 09:12:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 09:12:06,720 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:12:06,720 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2025-03-03 09:12:06,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-03 09:12:06,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-03 09:12:06,921 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:12:06,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:12:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1069899265, now seen corresponding path program 33 times [2025-03-03 09:12:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:12:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861974994] [2025-03-03 09:12:06,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:12:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:12:06,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 22 equivalence classes. [2025-03-03 09:12:07,437 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 09:12:07,437 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-03-03 09:12:07,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:12:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:12:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:12:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861974994] [2025-03-03 09:12:08,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861974994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:12:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160945908] [2025-03-03 09:12:08,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:12:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:12:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:12:08,896 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:12:08,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-03 09:12:09,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 22 equivalence classes.