./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/phases_1-2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 02:56:01,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 02:56:01,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 02:56:01,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 02:56:01,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 02:56:01,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 02:56:01,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 02:56:01,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 02:56:01,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 02:56:01,292 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 02:56:01,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 02:56:01,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 02:56:01,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 02:56:01,293 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 02:56:01,293 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 02:56:01,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 02:56:01,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 02:56:01,293 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 02:56:01,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 02:56:01,294 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 02:56:01,295 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:01,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:56:01,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:01,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 02:56:01,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 02:56:01,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 02:56:01,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 02:56:01,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 02:56:01,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 02:56:01,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 02:56:01,297 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-jdk21/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 -> 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 [2025-01-09 02:56:01,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 02:56:01,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 02:56:01,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 02:56:01,576 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 02:56:01,578 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 02:56:01,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2025-01-09 02:56:02,815 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8330c8c0a/0158e28b2b9b420ea515a0045a5cb960/FLAGcddd6e0fb [2025-01-09 02:56:03,072 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 02:56:03,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2025-01-09 02:56:03,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8330c8c0a/0158e28b2b9b420ea515a0045a5cb960/FLAGcddd6e0fb [2025-01-09 02:56:03,409 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8330c8c0a/0158e28b2b9b420ea515a0045a5cb960 [2025-01-09 02:56:03,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 02:56:03,412 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 02:56:03,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 02:56:03,415 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 02:56:03,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 02:56:03,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf8b581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03, skipping insertion in model container [2025-01-09 02:56:03,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,435 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 02:56:03,551 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2025-01-09 02:56:03,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:56:03,572 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 02:56:03,581 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2025-01-09 02:56:03,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:56:03,596 INFO L204 MainTranslator]: Completed translation [2025-01-09 02:56:03,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03 WrapperNode [2025-01-09 02:56:03,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 02:56:03,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 02:56:03,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 02:56:03,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 02:56:03,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,621 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2025-01-09 02:56:03,621 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 02:56:03,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 02:56:03,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 02:56:03,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 02:56:03,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,638 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]. [2025-01-09 02:56:03,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,644 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,644 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,650 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 02:56:03,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 02:56:03,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 02:56:03,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 02:56:03,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (1/1) ... [2025-01-09 02:56:03,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:03,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 02:56:03,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 02:56:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 02:56:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 02:56:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 02:56:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 02:56:03,763 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 02:56:03,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 02:56:03,864 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-01-09 02:56:03,865 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 02:56:03,872 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 02:56:03,873 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 02:56:03,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:56:03 BoogieIcfgContainer [2025-01-09 02:56:03,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 02:56:03,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 02:56:03,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 02:56:03,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 02:56:03,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 02:56:03" (1/3) ... [2025-01-09 02:56:03,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e4dc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:56:03, skipping insertion in model container [2025-01-09 02:56:03,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:03" (2/3) ... [2025-01-09 02:56:03,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e4dc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:56:03, skipping insertion in model container [2025-01-09 02:56:03,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:56:03" (3/3) ... [2025-01-09 02:56:03,884 INFO L128 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2025-01-09 02:56:03,897 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 02:56:03,899 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG phases_1-2.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 02:56:03,948 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 02:56:03,958 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;@45d60611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 02:56:03,958 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 02:56:03,961 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) [2025-01-09 02:56:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-01-09 02:56:03,966 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:03,966 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-01-09 02:56:03,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:03,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 28702733, now seen corresponding path program 1 times [2025-01-09 02:56:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:03,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537893506] [2025-01-09 02:56:03,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:04,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-09 02:56:04,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-09 02:56:04,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:04,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537893506] [2025-01-09 02:56:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537893506] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:56:04,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 02:56:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 02:56:04,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88783503] [2025-01-09 02:56:04,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:56:04,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 02:56:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:04,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 02:56:04,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 02:56:04,298 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2025-01-09 02:56:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:04,346 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2025-01-09 02:56:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 02:56:04,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2025-01-09 02:56:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:04,354 INFO L225 Difference]: With dead ends: 22 [2025-01-09 02:56:04,354 INFO L226 Difference]: Without dead ends: 9 [2025-01-09 02:56:04,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 02:56:04,362 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:04,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:56:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-01-09 02:56:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-01-09 02:56:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2025-01-09 02:56:04,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2025-01-09 02:56:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:04,394 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2025-01-09 02:56:04,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2025-01-09 02:56:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2025-01-09 02:56:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 02:56:04,394 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:04,395 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:04,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 02:56:04,395 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:04,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891882, now seen corresponding path program 1 times [2025-01-09 02:56:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:04,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107872281] [2025-01-09 02:56:04,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:04,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 02:56:04,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 02:56:04,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:04,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107872281] [2025-01-09 02:56:04,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107872281] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894929751] [2025-01-09 02:56:04,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:04,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:04,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 02:56:04,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 02:56:04,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 02:56:04,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:04,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:04,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 02:56:04,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:04,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894929751] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:04,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:04,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 02:56:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418258199] [2025-01-09 02:56:04,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:04,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 02:56:04,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:04,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 02:56:04,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-01-09 02:56:04,644 INFO L87 Difference]: Start difference. First operand 9 states and 10 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) [2025-01-09 02:56:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:04,699 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2025-01-09 02:56:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 02:56:04,700 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 [2025-01-09 02:56:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:04,700 INFO L225 Difference]: With dead ends: 18 [2025-01-09 02:56:04,700 INFO L226 Difference]: Without dead ends: 13 [2025-01-09 02:56:04,700 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 [2025-01-09 02:56:04,701 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:04,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:56:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-01-09 02:56:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-01-09 02:56:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2025-01-09 02:56:04,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2025-01-09 02:56:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:04,706 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2025-01-09 02:56:04,706 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) [2025-01-09 02:56:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2025-01-09 02:56:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 02:56:04,706 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:04,706 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:04,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 02:56:04,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:04,907 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:04,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1575254626, now seen corresponding path program 1 times [2025-01-09 02:56:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:04,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642398634] [2025-01-09 02:56:04,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:04,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 02:56:04,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 02:56:04,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:04,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642398634] [2025-01-09 02:56:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642398634] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680460906] [2025-01-09 02:56:05,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:05,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 02:56:05,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 02:56:05,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 02:56:05,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:05,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:05,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 02:56:05,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:05,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 02:56:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680460906] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:05,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:05,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2025-01-09 02:56:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474443029] [2025-01-09 02:56:05,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:05,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 02:56:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:05,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 02:56:05,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-01-09 02:56:05,187 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:05,254 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-01-09 02:56:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 02:56:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-09 02:56:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:05,256 INFO L225 Difference]: With dead ends: 24 [2025-01-09 02:56:05,256 INFO L226 Difference]: Without dead ends: 17 [2025-01-09 02:56:05,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-01-09 02:56:05,257 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:05,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:56:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-01-09 02:56:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2025-01-09 02:56:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2025-01-09 02:56:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2025-01-09 02:56:05,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2025-01-09 02:56:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:05,262 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2025-01-09 02:56:05,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2025-01-09 02:56:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 02:56:05,263 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:05,263 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:05,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 02:56:05,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:05,468 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:05,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1926377919, now seen corresponding path program 2 times [2025-01-09 02:56:05,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:05,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356421264] [2025-01-09 02:56:05,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:05,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:05,475 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-09 02:56:05,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 02:56:05,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:05,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:05,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356421264] [2025-01-09 02:56:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356421264] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746944391] [2025-01-09 02:56:05,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:05,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:05,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:05,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 02:56:05,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-09 02:56:05,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 02:56:05,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:05,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:05,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 02:56:05,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:05,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746944391] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:05,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-01-09 02:56:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260971601] [2025-01-09 02:56:05,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:05,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 02:56:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:05,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 02:56:05,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2025-01-09 02:56:05,874 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:06,036 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2025-01-09 02:56:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 02:56:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-01-09 02:56:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:06,037 INFO L225 Difference]: With dead ends: 36 [2025-01-09 02:56:06,037 INFO L226 Difference]: Without dead ends: 28 [2025-01-09 02:56:06,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2025-01-09 02:56:06,038 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:06,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:56:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-01-09 02:56:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-01-09 02:56:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2025-01-09 02:56:06,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2025-01-09 02:56:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:06,046 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2025-01-09 02:56:06,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2025-01-09 02:56:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 02:56:06,047 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:06,047 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:06,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 02:56:06,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:06,248 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:06,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -653407827, now seen corresponding path program 3 times [2025-01-09 02:56:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:06,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243252931] [2025-01-09 02:56:06,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:56:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:06,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 11 equivalence classes. [2025-01-09 02:56:06,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 11 of 25 statements. [2025-01-09 02:56:06,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 02:56:06,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 02:56:06,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243252931] [2025-01-09 02:56:06,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243252931] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436897811] [2025-01-09 02:56:06,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:56:06,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:06,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:06,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 02:56:06,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 11 equivalence classes. [2025-01-09 02:56:06,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 11 of 25 statements. [2025-01-09 02:56:06,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 02:56:06,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:06,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 02:56:06,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 02:56:06,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 02:56:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436897811] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:06,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 02:56:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825463133] [2025-01-09 02:56:06,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:06,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 02:56:06,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:06,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 02:56:06,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-01-09 02:56:06,464 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:06,534 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2025-01-09 02:56:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 02:56:06,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-09 02:56:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:06,536 INFO L225 Difference]: With dead ends: 48 [2025-01-09 02:56:06,536 INFO L226 Difference]: Without dead ends: 45 [2025-01-09 02:56:06,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2025-01-09 02:56:06,537 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:06,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:56:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-01-09 02:56:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2025-01-09 02:56:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-01-09 02:56:06,548 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2025-01-09 02:56:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:06,549 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-01-09 02:56:06,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-01-09 02:56:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-09 02:56:06,550 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:06,550 INFO L218 NwaCegarLoop]: trace histogram [13, 9, 4, 1, 1, 1, 1, 1] [2025-01-09 02:56:06,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 02:56:06,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:06,754 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:06,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash -244539650, now seen corresponding path program 4 times [2025-01-09 02:56:06,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:06,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314330991] [2025-01-09 02:56:06,756 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:56:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:06,762 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-01-09 02:56:06,773 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 02:56:06,773 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:56:06,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 02:56:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314330991] [2025-01-09 02:56:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314330991] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805423870] [2025-01-09 02:56:07,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:56:07,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:07,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:07,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 02:56:07,032 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-01-09 02:56:07,048 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 02:56:07,049 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:56:07,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:07,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 02:56:07,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 02:56:07,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 02:56:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805423870] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:07,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 26 [2025-01-09 02:56:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404806767] [2025-01-09 02:56:07,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:07,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 02:56:07,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:07,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 02:56:07,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2025-01-09 02:56:07,655 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:11,193 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2025-01-09 02:56:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-09 02:56:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-01-09 02:56:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:11,195 INFO L225 Difference]: With dead ends: 72 [2025-01-09 02:56:11,196 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 02:56:11,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=464, Invalid=796, Unknown=0, NotChecked=0, Total=1260 [2025-01-09 02:56:11,198 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:11,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:56:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 02:56:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-01-09 02:56:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2025-01-09 02:56:11,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2025-01-09 02:56:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:11,210 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2025-01-09 02:56:11,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2025-01-09 02:56:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 02:56:11,212 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:11,212 INFO L218 NwaCegarLoop]: trace histogram [25, 21, 4, 1, 1, 1, 1, 1] [2025-01-09 02:56:11,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 02:56:11,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:11,413 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:11,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash -562373926, now seen corresponding path program 5 times [2025-01-09 02:56:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887286788] [2025-01-09 02:56:11,414 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:56:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:11,422 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 26 equivalence classes. [2025-01-09 02:56:11,491 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 02:56:11,494 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2025-01-09 02:56:11,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 154 proven. 462 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 02:56:12,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887286788] [2025-01-09 02:56:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887286788] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617101031] [2025-01-09 02:56:12,077 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:56:12,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:12,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:12,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:56:12,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 02:56:12,107 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 26 equivalence classes. [2025-01-09 02:56:12,176 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 02:56:12,176 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2025-01-09 02:56:12,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:12,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-01-09 02:56:12,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:12,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617101031] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:13,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 28] total 54 [2025-01-09 02:56:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578033855] [2025-01-09 02:56:13,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:13,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-09 02:56:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:13,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-09 02:56:13,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=2058, Unknown=0, NotChecked=0, Total=2862 [2025-01-09 02:56:13,668 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)