./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/diamond_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd9be28702be20fbd75b67eebfdc5f85895ff340c238c235c391c2a8578e7b23 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 04:39:49,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 04:39:49,171 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 04:39:49,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 04:39:49,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 04:39:49,194 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 04:39:49,194 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 04:39:49,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 04:39:49,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 04:39:49,194 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 04:39:49,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 04:39:49,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 04:39:49,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 04:39:49,195 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 04:39:49,196 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 04:39:49,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 04:39:49,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 04:39:49,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 04:39:49,197 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 -> bd9be28702be20fbd75b67eebfdc5f85895ff340c238c235c391c2a8578e7b23 [2025-03-08 04:39:49,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 04:39:49,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 04:39:49,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 04:39:49,404 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 04:39:49,405 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 04:39:49,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2025-03-08 04:39:50,523 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adceb4a1d/011b61a554764abaa5e84ea142d2b0f9/FLAGc49218a75 [2025-03-08 04:39:50,740 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 04:39:50,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2025-03-08 04:39:50,754 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adceb4a1d/011b61a554764abaa5e84ea142d2b0f9/FLAGc49218a75 [2025-03-08 04:39:50,794 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adceb4a1d/011b61a554764abaa5e84ea142d2b0f9 [2025-03-08 04:39:50,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 04:39:50,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 04:39:50,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 04:39:50,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 04:39:50,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 04:39:50,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fdc8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50, skipping insertion in model container [2025-03-08 04:39:50,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,815 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 04:39:50,917 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/loop-acceleration/diamond_1-1.c[373,386] [2025-03-08 04:39:50,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 04:39:50,933 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 04:39:50,939 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/loop-acceleration/diamond_1-1.c[373,386] [2025-03-08 04:39:50,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 04:39:50,950 INFO L204 MainTranslator]: Completed translation [2025-03-08 04:39:50,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50 WrapperNode [2025-03-08 04:39:50,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 04:39:50,952 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 04:39:50,952 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 04:39:50,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 04:39:50,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,968 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2025-03-08 04:39:50,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 04:39:50,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 04:39:50,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 04:39:50,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 04:39:50,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,975 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,985 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 04:39:50,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,986 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,988 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 04:39:50,990 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 04:39:50,990 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 04:39:50,990 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 04:39:50,991 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (1/1) ... [2025-03-08 04:39:50,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 04:39:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:51,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 04:39:51,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 04:39:51,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 04:39:51,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 04:39:51,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 04:39:51,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 04:39:51,064 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 04:39:51,065 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 04:39:51,144 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 04:39:51,145 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 04:39:51,150 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 04:39:51,150 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 04:39:51,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 04:39:51 BoogieIcfgContainer [2025-03-08 04:39:51,150 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 04:39:51,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 04:39:51,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 04:39:51,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 04:39:51,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 04:39:50" (1/3) ... [2025-03-08 04:39:51,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513a88ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 04:39:51, skipping insertion in model container [2025-03-08 04:39:51,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:39:50" (2/3) ... [2025-03-08 04:39:51,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513a88ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 04:39:51, skipping insertion in model container [2025-03-08 04:39:51,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 04:39:51" (3/3) ... [2025-03-08 04:39:51,158 INFO L128 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2025-03-08 04:39:51,167 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 04:39:51,168 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG diamond_1-1.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 04:39:51,201 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 04:39:51,210 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;@6a8f9287, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 04:39:51,210 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 04:39:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 04:39:51,216 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:51,216 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 04:39:51,217 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:51,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 40045990, now seen corresponding path program 1 times [2025-03-08 04:39:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351507037] [2025-03-08 04:39:51,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:51,273 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 04:39:51,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 04:39:51,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:51,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:51,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351507037] [2025-03-08 04:39:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351507037] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:39:51,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:39:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 04:39:51,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421513005] [2025-03-08 04:39:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:39:51,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 04:39:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:51,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 04:39:51,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 04:39:51,419 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:51,445 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2025-03-08 04:39:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 04:39:51,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2025-03-08 04:39:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:51,452 INFO L225 Difference]: With dead ends: 20 [2025-03-08 04:39:51,452 INFO L226 Difference]: Without dead ends: 9 [2025-03-08 04:39:51,454 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 [2025-03-08 04:39:51,456 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:51,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:39:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-03-08 04:39:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2025-03-08 04:39:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2025-03-08 04:39:51,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2025-03-08 04:39:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:51,474 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2025-03-08 04:39:51,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2025-03-08 04:39:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 04:39:51,475 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:51,475 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:39:51,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 04:39:51,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:51,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -167646296, now seen corresponding path program 1 times [2025-03-08 04:39:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752163798] [2025-03-08 04:39:51,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:51,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 04:39:51,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 04:39:51,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:51,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752163798] [2025-03-08 04:39:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752163798] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:39:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36025509] [2025-03-08 04:39:51,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:51,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:51,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:51,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:39:51,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 04:39:51,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 04:39:51,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 04:39:51,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:51,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:51,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 04:39:51,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:39:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:51,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:39:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:51,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36025509] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:39:51,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:39:51,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 04:39:51,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425847194] [2025-03-08 04:39:51,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:39:51,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 04:39:51,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:51,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 04:39:51,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-03-08 04:39:51,686 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:51,758 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2025-03-08 04:39:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 04:39:51,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) Word has length 7 [2025-03-08 04:39:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:51,759 INFO L225 Difference]: With dead ends: 19 [2025-03-08 04:39:51,759 INFO L226 Difference]: Without dead ends: 16 [2025-03-08 04:39:51,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-03-08 04:39:51,760 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:51,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:39:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-08 04:39:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2025-03-08 04:39:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-03-08 04:39:51,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2025-03-08 04:39:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:51,764 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-03-08 04:39:51,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-03-08 04:39:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 04:39:51,764 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:51,765 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2025-03-08 04:39:51,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 04:39:51,965 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 [2025-03-08 04:39:51,965 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:51,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 13251246, now seen corresponding path program 2 times [2025-03-08 04:39:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:51,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543182464] [2025-03-08 04:39:51,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:39:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:51,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-08 04:39:51,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 04:39:51,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:39:51,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543182464] [2025-03-08 04:39:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543182464] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:39:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727558265] [2025-03-08 04:39:52,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:39:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:52,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:39:52,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 04:39:52,159 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-08 04:39:52,169 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 04:39:52,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:39:52,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:52,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 04:39:52,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:39:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:52,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:39:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:52,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727558265] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:39:52,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:39:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-08 04:39:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055600546] [2025-03-08 04:39:52,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:39:52,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 04:39:52,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:52,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 04:39:52,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2025-03-08 04:39:52,301 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:52,528 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2025-03-08 04:39:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 04:39:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-08 04:39:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:52,529 INFO L225 Difference]: With dead ends: 40 [2025-03-08 04:39:52,529 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 04:39:52,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-03-08 04:39:52,530 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:52,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 04:39:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 04:39:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2025-03-08 04:39:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2025-03-08 04:39:52,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 13 [2025-03-08 04:39:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:52,538 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2025-03-08 04:39:52,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2025-03-08 04:39:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 04:39:52,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:52,539 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2025-03-08 04:39:52,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 04:39:52,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-08 04:39:52,743 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:52,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash -822576365, now seen corresponding path program 1 times [2025-03-08 04:39:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277613251] [2025-03-08 04:39:52,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:52,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 04:39:52,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:39:52,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:52,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 04:39:52,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:52,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277613251] [2025-03-08 04:39:52,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277613251] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:39:52,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:39:52,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 04:39:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562500240] [2025-03-08 04:39:52,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:39:52,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 04:39:52,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:52,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 04:39:52,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 04:39:52,780 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2025-03-08 04:39:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:52,791 INFO L93 Difference]: Finished difference Result 53 states and 75 transitions. [2025-03-08 04:39:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 04:39:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 19 [2025-03-08 04:39:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:52,793 INFO L225 Difference]: With dead ends: 53 [2025-03-08 04:39:52,793 INFO L226 Difference]: Without dead ends: 39 [2025-03-08 04:39:52,793 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 [2025-03-08 04:39:52,794 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:52,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:39:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-08 04:39:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-08 04:39:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 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) [2025-03-08 04:39:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2025-03-08 04:39:52,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 19 [2025-03-08 04:39:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:52,803 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2025-03-08 04:39:52,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2025-03-08 04:39:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2025-03-08 04:39:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 04:39:52,804 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:52,804 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2025-03-08 04:39:52,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 04:39:52,804 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:52,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 375903501, now seen corresponding path program 1 times [2025-03-08 04:39:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:52,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720317382] [2025-03-08 04:39:52,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:52,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:52,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 04:39:52,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:39:52,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:52,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720317382] [2025-03-08 04:39:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720317382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:39:52,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653481979] [2025-03-08 04:39:52,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:39:52,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:52,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:39:52,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 04:39:52,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 04:39:52,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:39:52,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:39:52,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:52,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 04:39:52,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:39:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:53,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:39:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653481979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:39:53,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:39:53,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-03-08 04:39:53,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668189143] [2025-03-08 04:39:53,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:39:53,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 04:39:53,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:53,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 04:39:53,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2025-03-08 04:39:53,192 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2025-03-08 04:39:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:53,789 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2025-03-08 04:39:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 04:39:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) Word has length 19 [2025-03-08 04:39:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:53,790 INFO L225 Difference]: With dead ends: 117 [2025-03-08 04:39:53,790 INFO L226 Difference]: Without dead ends: 114 [2025-03-08 04:39:53,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2025-03-08 04:39:53,792 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:53,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 04:39:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-08 04:39:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2025-03-08 04:39:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2025-03-08 04:39:53,802 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 19 [2025-03-08 04:39:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:53,802 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2025-03-08 04:39:53,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2025-03-08 04:39:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2025-03-08 04:39:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 04:39:53,803 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:53,803 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2025-03-08 04:39:53,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 04:39:54,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:54,003 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:54,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash -99710150, now seen corresponding path program 3 times [2025-03-08 04:39:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:54,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650187935] [2025-03-08 04:39:54,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:39:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:54,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 11 equivalence classes. [2025-03-08 04:39:54,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 04:39:54,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 04:39:54,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650187935] [2025-03-08 04:39:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650187935] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:39:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380195521] [2025-03-08 04:39:54,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:39:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:54,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:39:54,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 04:39:54,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 11 equivalence classes. [2025-03-08 04:39:54,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 04:39:54,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 04:39:54,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:54,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 04:39:54,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:39:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:54,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:39:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:54,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380195521] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:39:54,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:39:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-08 04:39:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889461289] [2025-03-08 04:39:54,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:39:54,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 04:39:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:54,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 04:39:54,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2025-03-08 04:39:54,472 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:57,145 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2025-03-08 04:39:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 04:39:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-08 04:39:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:57,147 INFO L225 Difference]: With dead ends: 199 [2025-03-08 04:39:57,149 INFO L226 Difference]: Without dead ends: 196 [2025-03-08 04:39:57,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 04:39:57,150 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:57,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 04:39:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-08 04:39:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 81. [2025-03-08 04:39:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2025-03-08 04:39:57,171 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 25 [2025-03-08 04:39:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:57,171 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2025-03-08 04:39:57,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2025-03-08 04:39:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 04:39:57,172 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:57,172 INFO L218 NwaCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1] [2025-03-08 04:39:57,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 04:39:57,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:57,372 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:57,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1627056233, now seen corresponding path program 2 times [2025-03-08 04:39:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:57,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6824608] [2025-03-08 04:39:57,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:39:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:57,376 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-08 04:39:57,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 04:39:57,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:39:57,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2025-03-08 04:39:57,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:57,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6824608] [2025-03-08 04:39:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6824608] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:39:57,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:39:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 04:39:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236950954] [2025-03-08 04:39:57,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:39:57,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 04:39:57,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:57,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 04:39:57,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 04:39:57,395 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:39:57,407 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2025-03-08 04:39:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 04:39:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2025-03-08 04:39:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:39:57,408 INFO L225 Difference]: With dead ends: 111 [2025-03-08 04:39:57,408 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 04:39:57,408 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 [2025-03-08 04:39:57,409 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:39:57,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:39:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 04:39:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 04:39:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2025-03-08 04:39:57,422 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 35 [2025-03-08 04:39:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:39:57,422 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2025-03-08 04:39:57,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:39:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2025-03-08 04:39:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 04:39:57,423 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:39:57,423 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2025-03-08 04:39:57,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 04:39:57,423 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:39:57,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:39:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1214663242, now seen corresponding path program 2 times [2025-03-08 04:39:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:39:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666084564] [2025-03-08 04:39:57,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:39:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:39:57,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 04:39:57,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 04:39:57,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:39:57,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:39:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666084564] [2025-03-08 04:39:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666084564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:39:57,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302328197] [2025-03-08 04:39:57,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:39:57,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:39:57,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:39:57,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:39:57,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 04:39:57,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 04:39:57,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 04:39:57,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:39:57,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:39:57,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 04:39:57,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:39:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:57,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:39:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:39:58,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302328197] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:39:58,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:39:58,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2025-03-08 04:39:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063720048] [2025-03-08 04:39:58,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:39:58,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 04:39:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:39:58,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 04:39:58,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=938, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 04:39:58,297 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2025-03-08 04:40:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:40:10,589 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2025-03-08 04:40:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-08 04:40:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) Word has length 37 [2025-03-08 04:40:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:40:10,590 INFO L225 Difference]: With dead ends: 120 [2025-03-08 04:40:10,590 INFO L226 Difference]: Without dead ends: 117 [2025-03-08 04:40:10,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=986, Invalid=1770, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 04:40:10,591 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 04:40:10,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 04:40:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-08 04:40:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2025-03-08 04:40:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 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) [2025-03-08 04:40:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2025-03-08 04:40:10,601 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 37 [2025-03-08 04:40:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:40:10,601 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2025-03-08 04:40:10,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2025-03-08 04:40:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2025-03-08 04:40:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 04:40:10,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:40:10,602 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2025-03-08 04:40:10,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 04:40:10,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:40:10,803 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:40:10,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:40:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -111352238, now seen corresponding path program 4 times [2025-03-08 04:40:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:40:10,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932879879] [2025-03-08 04:40:10,804 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:40:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:40:10,807 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-08 04:40:10,823 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 04:40:10,823 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:40:10,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:40:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:40:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:40:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932879879] [2025-03-08 04:40:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932879879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:40:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779620411] [2025-03-08 04:40:11,172 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:40:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:40:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:40:11,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:40:11,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 04:40:11,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-08 04:40:11,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 04:40:11,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:40:11,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:40:11,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 04:40:11,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:40:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:40:11,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:40:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:40:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779620411] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:40:11,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:40:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-08 04:40:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713597042] [2025-03-08 04:40:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:40:11,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-08 04:40:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:40:11,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-08 04:40:11,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2025-03-08 04:40:11,927 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:41:37,157 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2025-03-08 04:41:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 04:41:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-08 04:41:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:41:37,159 INFO L225 Difference]: With dead ends: 168 [2025-03-08 04:41:37,160 INFO L226 Difference]: Without dead ends: 165 [2025-03-08 04:41:37,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 85.2s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2025-03-08 04:41:37,162 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 04:41:37,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 77 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 04:41:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-03-08 04:41:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2025-03-08 04:41:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2025-03-08 04:41:37,182 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 49 [2025-03-08 04:41:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:41:37,182 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2025-03-08 04:41:37,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2025-03-08 04:41:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-08 04:41:37,188 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:41:37,188 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2025-03-08 04:41:37,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 04:41:37,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:41:37,388 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:41:37,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:41:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 421174856, now seen corresponding path program 3 times [2025-03-08 04:41:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:41:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555917366] [2025-03-08 04:41:37,390 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:41:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:41:37,398 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 35 equivalence classes. [2025-03-08 04:41:37,406 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 9 of 73 statements. [2025-03-08 04:41:37,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 04:41:37,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:41:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2025-03-08 04:41:37,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:41:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555917366] [2025-03-08 04:41:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555917366] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:41:37,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:41:37,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 04:41:37,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133304047] [2025-03-08 04:41:37,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:41:37,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 04:41:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:41:37,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 04:41:37,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 04:41:37,574 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:41:37,641 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2025-03-08 04:41:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 04:41:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2025-03-08 04:41:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:41:37,643 INFO L225 Difference]: With dead ends: 165 [2025-03-08 04:41:37,643 INFO L226 Difference]: Without dead ends: 0 [2025-03-08 04:41:37,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 04:41:37,644 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:41:37,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:41:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-08 04:41:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-08 04:41:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-08 04:41:37,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2025-03-08 04:41:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:41:37,646 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-08 04:41:37,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:41:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-08 04:41:37,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-08 04:41:37,649 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-08 04:41:37,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 04:41:37,651 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1] [2025-03-08 04:41:37,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-08 04:41:38,988 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 04:41:38,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 04:41:38 BoogieIcfgContainer [2025-03-08 04:41:38,999 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 04:41:38,999 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 04:41:38,999 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 04:41:38,999 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 04:41:39,000 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 04:39:51" (3/4) ... [2025-03-08 04:41:39,001 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 04:41:39,007 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2025-03-08 04:41:39,007 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-08 04:41:39,007 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-08 04:41:39,007 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-08 04:41:39,059 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 04:41:39,060 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 04:41:39,060 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 04:41:39,061 INFO L158 Benchmark]: Toolchain (without parser) took 108263.44ms. Allocated memory was 142.6MB in the beginning and 276.8MB in the end (delta: 134.2MB). Free memory was 110.9MB in the beginning and 100.1MB in the end (delta: 10.8MB). Peak memory consumption was 143.8MB. Max. memory is 16.1GB. [2025-03-08 04:41:39,061 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 04:41:39,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.23ms. Allocated memory is still 142.6MB. Free memory was 110.9MB in the beginning and 100.6MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 04:41:39,061 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.08ms. Allocated memory is still 142.6MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 04:41:39,061 INFO L158 Benchmark]: Boogie Preprocessor took 19.97ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 97.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 04:41:39,062 INFO L158 Benchmark]: IcfgBuilder took 160.53ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 88.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 04:41:39,062 INFO L158 Benchmark]: TraceAbstraction took 107845.98ms. Allocated memory was 142.6MB in the beginning and 276.8MB in the end (delta: 134.2MB). Free memory was 87.3MB in the beginning and 106.2MB in the end (delta: -18.9MB). Peak memory consumption was 131.2MB. Max. memory is 16.1GB. [2025-03-08 04:41:39,063 INFO L158 Benchmark]: Witness Printer took 60.69ms. Allocated memory is still 276.8MB. Free memory was 106.2MB in the beginning and 100.1MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 04:41:39,064 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.23ms. Allocated memory is still 142.6MB. Free memory was 110.9MB in the beginning and 100.6MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.08ms. Allocated memory is still 142.6MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.97ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 97.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 160.53ms. Allocated memory is still 142.6MB. Free memory was 97.9MB in the beginning and 88.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 107845.98ms. Allocated memory was 142.6MB in the beginning and 276.8MB in the end (delta: 134.2MB). Free memory was 87.3MB in the beginning and 106.2MB in the end (delta: -18.9MB). Peak memory consumption was 131.2MB. Max. memory is 16.1GB. * Witness Printer took 60.69ms. Allocated memory is still 276.8MB. Free memory was 106.2MB in the beginning and 100.1MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 13 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 106.5s, OverallIterations: 10, TraceHistogramMax: 34, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 101.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 283 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 225 mSDsCounter, 578 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2767 IncrementalHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 578 mSolverCounterUnsat, 58 mSDtfsCounter, 2767 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 442 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 101.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=9, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 186 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 432 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 560 ConstructedInterpolants, 0 QuantifiedInterpolants, 1922 SizeOfPredicates, 0 NumberOfNonLiveVariables, 463 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 1430/4148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Location Invariant Derived location invariant: ((((y % 2) != 0) && ((x < ((49 + (x / 2)) + (y % 2))) || ((y % 2) < ((x % 2) + 1)))) || (((y % 2) == 0) && ((x % 2) <= 0))) RESULT: Ultimate proved your program to be correct!