./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m2.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/array-crafted/zero_sum_const_m2.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 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:26:27,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:26:27,089 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:26:27,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:26:27,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:26:27,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:26:27,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:26:27,117 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:26:27,117 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:26:27,117 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:26:27,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:26:27,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:26:27,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:26:27,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:26:27,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:26:27,119 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:26:27,122 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:26:27,123 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:27,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:27,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:26:27,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:26:27,123 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 -> 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 [2025-01-08 22:26:27,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:26:27,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:26:27,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:26:27,360 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:26:27,360 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:26:27,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2025-01-08 22:26:28,497 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cd688a1e3/d8fd465fcbc14cac92a6a739650833b6/FLAG52f4a6f2c [2025-01-08 22:26:28,770 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:26:28,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2025-01-08 22:26:28,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cd688a1e3/d8fd465fcbc14cac92a6a739650833b6/FLAG52f4a6f2c [2025-01-08 22:26:28,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cd688a1e3/d8fd465fcbc14cac92a6a739650833b6 [2025-01-08 22:26:28,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:26:28,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:26:28,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:26:28,807 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:26:28,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:26:28,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:26:28" (1/1) ... [2025-01-08 22:26:28,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd6818d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:28, skipping insertion in model container [2025-01-08 22:26:28,811 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:26:28" (1/1) ... [2025-01-08 22:26:28,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:26:28,958 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/array-crafted/zero_sum_const_m2.c[408,421] [2025-01-08 22:26:28,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:26:28,983 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:26:28,990 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/array-crafted/zero_sum_const_m2.c[408,421] [2025-01-08 22:26:28,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:26:29,008 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:26:29,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29 WrapperNode [2025-01-08 22:26:29,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:26:29,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:26:29,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:26:29,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:26:29,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,033 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2025-01-08 22:26:29,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:26:29,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:26:29,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:26:29,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:26:29,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,054 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-08 22:26:29,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,062 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,069 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:26:29,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:26:29,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:26:29,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:26:29,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (1/1) ... [2025-01-08 22:26:29,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:26:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:29,113 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) [2025-01-08 22:26:29,118 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 [2025-01-08 22:26:29,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:26:29,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:26:29,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:26:29,199 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:26:29,201 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:26:29,321 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-08 22:26:29,321 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:26:29,329 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:26:29,329 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:26:29,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:26:29 BoogieIcfgContainer [2025-01-08 22:26:29,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:26:29,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:26:29,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:26:29,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:26:29,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:26:28" (1/3) ... [2025-01-08 22:26:29,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a8ade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:26:29, skipping insertion in model container [2025-01-08 22:26:29,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:26:29" (2/3) ... [2025-01-08 22:26:29,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a8ade0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:26:29, skipping insertion in model container [2025-01-08 22:26:29,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:26:29" (3/3) ... [2025-01-08 22:26:29,338 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2025-01-08 22:26:29,349 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:26:29,351 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m2.c that has 1 procedures, 16 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-01-08 22:26:29,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:26:29,405 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;@253c2482, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:26:29,405 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:26:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-08 22:26:29,416 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:29,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:29,418 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:29,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 688665335, now seen corresponding path program 1 times [2025-01-08 22:26:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:29,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35993934] [2025-01-08 22:26:29,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:29,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-08 22:26:29,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-08 22:26:29,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:29,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35993934] [2025-01-08 22:26:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35993934] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:26:29,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:26:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:26:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335563522] [2025-01-08 22:26:29,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:26:29,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:26:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:29,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:26:29,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:26:29,613 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:29,643 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2025-01-08 22:26:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:26:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-08 22:26:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:29,648 INFO L225 Difference]: With dead ends: 29 [2025-01-08 22:26:29,648 INFO L226 Difference]: Without dead ends: 12 [2025-01-08 22:26:29,650 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 [2025-01-08 22:26:29,652 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:29,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-01-08 22:26:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2025-01-08 22:26:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2025-01-08 22:26:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2025-01-08 22:26:29,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 10 [2025-01-08 22:26:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:29,670 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2025-01-08 22:26:29,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2025-01-08 22:26:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-08 22:26:29,671 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:29,671 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:29,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:26:29,671 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:29,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -524416942, now seen corresponding path program 1 times [2025-01-08 22:26:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888981386] [2025-01-08 22:26:29,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:29,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-08 22:26:29,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-08 22:26:29,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:29,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:26:29,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:29,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888981386] [2025-01-08 22:26:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888981386] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:26:29,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:26:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:26:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18578326] [2025-01-08 22:26:29,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:26:29,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:26:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:29,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:26:29,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:26:29,742 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2025-01-08 22:26:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:29,780 INFO L93 Difference]: Finished difference Result 22 states and 32 transitions. [2025-01-08 22:26:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:26:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2025-01-08 22:26:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:29,781 INFO L225 Difference]: With dead ends: 22 [2025-01-08 22:26:29,781 INFO L226 Difference]: Without dead ends: 16 [2025-01-08 22:26:29,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:26:29,782 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:29,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-01-08 22:26:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-01-08 22:26:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2025-01-08 22:26:29,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2025-01-08 22:26:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:29,786 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2025-01-08 22:26:29,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2025-01-08 22:26:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2025-01-08 22:26:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-08 22:26:29,786 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:29,786 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:29,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:26:29,787 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:29,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1750393842, now seen corresponding path program 1 times [2025-01-08 22:26:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877676747] [2025-01-08 22:26:29,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:29,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-08 22:26:29,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:26:29,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:29,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-08 22:26:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877676747] [2025-01-08 22:26:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877676747] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403167002] [2025-01-08 22:26:29,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:26:29,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:29,883 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) [2025-01-08 22:26:29,884 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 [2025-01-08 22:26:29,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-08 22:26:29,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:26:29,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:29,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:29,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:26:29,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-08 22:26:30,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-08 22:26:30,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403167002] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:30,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:30,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-08 22:26:30,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467529214] [2025-01-08 22:26:30,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:30,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-08 22:26:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:30,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-08 22:26:30,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:26:30,038 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:30,060 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2025-01-08 22:26:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:26:30,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-01-08 22:26:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:30,061 INFO L225 Difference]: With dead ends: 28 [2025-01-08 22:26:30,061 INFO L226 Difference]: Without dead ends: 17 [2025-01-08 22:26:30,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:26:30,062 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:30,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-01-08 22:26:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-01-08 22:26:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-01-08 22:26:30,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 15 [2025-01-08 22:26:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:30,065 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-01-08 22:26:30,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-01-08 22:26:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-08 22:26:30,066 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:30,066 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:30,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-08 22:26:30,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:30,270 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:30,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 438265747, now seen corresponding path program 2 times [2025-01-08 22:26:30,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:30,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094896874] [2025-01-08 22:26:30,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:30,278 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-08 22:26:30,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:26:30,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:30,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:26:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094896874] [2025-01-08 22:26:30,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094896874] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535844705] [2025-01-08 22:26:30,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:30,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:30,373 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) [2025-01-08 22:26:30,373 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 [2025-01-08 22:26:30,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-08 22:26:30,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:26:30,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:30,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:30,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:26:30,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:26:30,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-08 22:26:30,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535844705] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:30,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:30,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-01-08 22:26:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983229608] [2025-01-08 22:26:30,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:30,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-08 22:26:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:30,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-08 22:26:30,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-01-08 22:26:30,488 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:30,521 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2025-01-08 22:26:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:26:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-08 22:26:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:30,522 INFO L225 Difference]: With dead ends: 30 [2025-01-08 22:26:30,522 INFO L226 Difference]: Without dead ends: 21 [2025-01-08 22:26:30,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-01-08 22:26:30,523 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:30,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 7 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:26:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-01-08 22:26:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-01-08 22:26:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2025-01-08 22:26:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-01-08 22:26:30,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2025-01-08 22:26:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:30,528 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-01-08 22:26:30,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-01-08 22:26:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-08 22:26:30,528 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:30,528 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:30,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-08 22:26:30,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:30,734 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:30,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 656047191, now seen corresponding path program 3 times [2025-01-08 22:26:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:30,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844568423] [2025-01-08 22:26:30,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:30,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-08 22:26:30,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-08 22:26:30,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:26:30,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844568423] [2025-01-08 22:26:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844568423] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307954888] [2025-01-08 22:26:31,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:31,774 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) [2025-01-08 22:26:31,777 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 [2025-01-08 22:26:31,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-08 22:26:31,826 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-08 22:26:31,827 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:26:31,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:31,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-01-08 22:26:31,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:26:32,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:32,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:26:32,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-01-08 22:26:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:26:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307954888] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:32,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 40 [2025-01-08 22:26:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254962303] [2025-01-08 22:26:32,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:32,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-01-08 22:26:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:32,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-01-08 22:26:32,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2025-01-08 22:26:32,544 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:33,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:33,033 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2025-01-08 22:26:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-08 22:26:33,034 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-01-08 22:26:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:33,035 INFO L225 Difference]: With dead ends: 50 [2025-01-08 22:26:33,035 INFO L226 Difference]: Without dead ends: 47 [2025-01-08 22:26:33,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:26:33,037 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:33,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:26:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-08 22:26:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2025-01-08 22:26:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-01-08 22:26:33,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 20 [2025-01-08 22:26:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:33,044 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-01-08 22:26:33,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-01-08 22:26:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-01-08 22:26:33,045 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:33,045 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:33,053 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 [2025-01-08 22:26:33,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:33,249 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:33,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 300917554, now seen corresponding path program 4 times [2025-01-08 22:26:33,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:33,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008790907] [2025-01-08 22:26:33,250 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:33,255 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-08 22:26:33,263 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-01-08 22:26:33,264 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:33,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-08 22:26:33,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008790907] [2025-01-08 22:26:33,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008790907] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76583777] [2025-01-08 22:26:33,308 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:33,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:33,312 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) [2025-01-08 22:26:33,317 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 [2025-01-08 22:26:33,347 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-08 22:26:33,355 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-01-08 22:26:33,355 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:33,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:33,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:26:33,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-08 22:26:33,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-08 22:26:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76583777] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:33,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-01-08 22:26:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121463183] [2025-01-08 22:26:33,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:33,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-08 22:26:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:33,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-08 22:26:33,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:26:33,426 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:33,517 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2025-01-08 22:26:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-08 22:26:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-01-08 22:26:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:33,518 INFO L225 Difference]: With dead ends: 57 [2025-01-08 22:26:33,518 INFO L226 Difference]: Without dead ends: 32 [2025-01-08 22:26:33,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-01-08 22:26:33,519 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:33,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-01-08 22:26:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2025-01-08 22:26:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2025-01-08 22:26:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-01-08 22:26:33,526 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 21 [2025-01-08 22:26:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:33,526 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-01-08 22:26:33,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-01-08 22:26:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-08 22:26:33,527 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:33,527 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:33,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:33,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-08 22:26:33,732 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:33,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash -527444871, now seen corresponding path program 5 times [2025-01-08 22:26:33,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:33,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095107180] [2025-01-08 22:26:33,733 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:33,738 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-08 22:26:33,744 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-08 22:26:33,744 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:26:33,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:26:33,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095107180] [2025-01-08 22:26:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095107180] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259035135] [2025-01-08 22:26:33,801 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:33,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:33,802 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) [2025-01-08 22:26:33,806 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 [2025-01-08 22:26:33,829 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-08 22:26:33,844 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-08 22:26:33,844 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:26:33,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:33,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:26:33,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:26:33,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:26:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259035135] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:33,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-01-08 22:26:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97351900] [2025-01-08 22:26:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:33,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-08 22:26:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:33,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-08 22:26:33,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:26:33,923 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:34,025 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2025-01-08 22:26:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-08 22:26:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-01-08 22:26:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:34,026 INFO L225 Difference]: With dead ends: 35 [2025-01-08 22:26:34,026 INFO L226 Difference]: Without dead ends: 26 [2025-01-08 22:26:34,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-01-08 22:26:34,027 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:34,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-01-08 22:26:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-01-08 22:26:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2025-01-08 22:26:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2025-01-08 22:26:34,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 22 [2025-01-08 22:26:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:34,031 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2025-01-08 22:26:34,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2025-01-08 22:26:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-08 22:26:34,032 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:34,032 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:34,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-08 22:26:34,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:34,236 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:34,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1349193298, now seen corresponding path program 6 times [2025-01-08 22:26:34,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:34,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084024500] [2025-01-08 22:26:34,237 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:34,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:34,244 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-01-08 22:26:34,266 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:26:34,267 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:26:34,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:35,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:35,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084024500] [2025-01-08 22:26:35,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084024500] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:35,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864784557] [2025-01-08 22:26:35,488 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:26:35,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:35,490 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) [2025-01-08 22:26:35,492 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 [2025-01-08 22:26:35,525 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-01-08 22:26:35,543 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:26:35,543 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:26:35,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:35,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-01-08 22:26:35,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:35,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:26:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:36,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:43,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-01-08 22:26:43,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:26:43,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2025-01-08 22:26:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:43,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864784557] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:43,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:43,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 61 [2025-01-08 22:26:43,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913256433] [2025-01-08 22:26:43,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:43,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-01-08 22:26:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:43,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-01-08 22:26:43,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3366, Unknown=3, NotChecked=0, Total=3660 [2025-01-08 22:26:43,216 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:47,331 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2025-01-08 22:26:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-01-08 22:26:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-08 22:26:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:47,333 INFO L225 Difference]: With dead ends: 75 [2025-01-08 22:26:47,333 INFO L226 Difference]: Without dead ends: 58 [2025-01-08 22:26:47,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1110, Invalid=8589, Unknown=3, NotChecked=0, Total=9702 [2025-01-08 22:26:47,335 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:47,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 123 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-01-08 22:26:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-08 22:26:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 29. [2025-01-08 22:26:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2025-01-08 22:26:47,342 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 25 [2025-01-08 22:26:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:47,342 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2025-01-08 22:26:47,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2025-01-08 22:26:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-08 22:26:47,343 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:47,343 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:47,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-08 22:26:47,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-08 22:26:47,544 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:47,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1124618235, now seen corresponding path program 7 times [2025-01-08 22:26:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176715622] [2025-01-08 22:26:47,545 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:47,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-08 22:26:47,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:26:47,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:47,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-08 22:26:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:47,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176715622] [2025-01-08 22:26:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176715622] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:47,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901343309] [2025-01-08 22:26:47,634 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:26:47,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:47,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:47,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:47,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-08 22:26:47,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-08 22:26:47,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:26:47,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:26:47,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:47,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-08 22:26:47,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-08 22:26:47,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-08 22:26:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901343309] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:47,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-01-08 22:26:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940442693] [2025-01-08 22:26:47,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:47,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:26:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:47,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:26:47,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:26:47,810 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:47,931 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2025-01-08 22:26:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:26:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-01-08 22:26:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:47,932 INFO L225 Difference]: With dead ends: 64 [2025-01-08 22:26:47,932 INFO L226 Difference]: Without dead ends: 31 [2025-01-08 22:26:47,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:26:47,933 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:47,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-08 22:26:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-01-08 22:26:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2025-01-08 22:26:47,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2025-01-08 22:26:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:47,940 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2025-01-08 22:26:47,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2025-01-08 22:26:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-08 22:26:47,940 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:47,940 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:47,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-08 22:26:48,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:48,141 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:48,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1543540151, now seen corresponding path program 8 times [2025-01-08 22:26:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575074994] [2025-01-08 22:26:48,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:48,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:48,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-08 22:26:48,155 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-08 22:26:48,155 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:48,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575074994] [2025-01-08 22:26:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575074994] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820111603] [2025-01-08 22:26:49,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:26:49,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:49,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:49,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-08 22:26:49,622 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-08 22:26:49,639 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-08 22:26:49,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:26:49,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:49,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-01-08 22:26:49,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:49,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:26:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:50,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:26:51,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820111603] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:51,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:51,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 22] total 58 [2025-01-08 22:26:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349908879] [2025-01-08 22:26:51,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:51,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-01-08 22:26:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:51,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-01-08 22:26:51,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3109, Unknown=0, NotChecked=0, Total=3306 [2025-01-08 22:26:51,063 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:52,057 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2025-01-08 22:26:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-08 22:26:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-01-08 22:26:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:52,058 INFO L225 Difference]: With dead ends: 50 [2025-01-08 22:26:52,058 INFO L226 Difference]: Without dead ends: 47 [2025-01-08 22:26:52,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=4403, Unknown=0, NotChecked=0, Total=4692 [2025-01-08 22:26:52,060 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:52,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:26:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-08 22:26:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2025-01-08 22:26:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2025-01-08 22:26:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2025-01-08 22:26:52,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 30 [2025-01-08 22:26:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:52,071 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2025-01-08 22:26:52,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2025-01-08 22:26:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-08 22:26:52,072 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:52,072 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:52,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-08 22:26:52,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:52,276 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:52,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash -566561198, now seen corresponding path program 9 times [2025-01-08 22:26:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951603592] [2025-01-08 22:26:52,276 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:52,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 4 equivalence classes. [2025-01-08 22:26:52,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-01-08 22:26:52,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:26:52,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-01-08 22:26:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951603592] [2025-01-08 22:26:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951603592] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852750520] [2025-01-08 22:26:52,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:26:52,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:52,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:52,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:52,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-08 22:26:52,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 4 equivalence classes. [2025-01-08 22:26:52,471 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-01-08 22:26:52,471 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:26:52,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:52,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:26:52,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-01-08 22:26:52,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-01-08 22:26:52,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852750520] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:52,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:52,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-01-08 22:26:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766264779] [2025-01-08 22:26:52,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:52,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-08 22:26:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:52,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-08 22:26:52,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:26:52,643 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:52,826 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2025-01-08 22:26:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-08 22:26:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2025-01-08 22:26:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:52,827 INFO L225 Difference]: With dead ends: 88 [2025-01-08 22:26:52,827 INFO L226 Difference]: Without dead ends: 49 [2025-01-08 22:26:52,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:26:52,828 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:52,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-01-08 22:26:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2025-01-08 22:26:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2025-01-08 22:26:52,842 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2025-01-08 22:26:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:52,842 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2025-01-08 22:26:52,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2025-01-08 22:26:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-08 22:26:52,843 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:52,843 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:52,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-08 22:26:53,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:53,049 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:53,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -144880679, now seen corresponding path program 10 times [2025-01-08 22:26:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:53,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994747217] [2025-01-08 22:26:53,050 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:53,056 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:26:53,060 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 32 statements. [2025-01-08 22:26:53,060 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:53,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-08 22:26:53,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994747217] [2025-01-08 22:26:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994747217] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250536908] [2025-01-08 22:26:53,163 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:26:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:53,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:53,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-08 22:26:53,199 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-01-08 22:26:53,213 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 32 statements. [2025-01-08 22:26:53,213 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:26:53,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:53,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:26:53,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-08 22:26:53,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-08 22:26:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250536908] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:53,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:53,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-01-08 22:26:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16997762] [2025-01-08 22:26:53,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:53,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-08 22:26:53,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:53,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-08 22:26:53,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-01-08 22:26:53,363 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:26:53,541 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2025-01-08 22:26:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-08 22:26:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-01-08 22:26:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:26:53,542 INFO L225 Difference]: With dead ends: 49 [2025-01-08 22:26:53,542 INFO L226 Difference]: Without dead ends: 36 [2025-01-08 22:26:53,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2025-01-08 22:26:53,543 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:26:53,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:26:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-08 22:26:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-01-08 22:26:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2025-01-08 22:26:53,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2025-01-08 22:26:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:26:53,556 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2025-01-08 22:26:53,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:26:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2025-01-08 22:26:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-08 22:26:53,556 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:26:53,556 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:26:53,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-08 22:26:53,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-08 22:26:53,757 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:26:53,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:26:53,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1356497074, now seen corresponding path program 11 times [2025-01-08 22:26:53,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:26:53,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348234806] [2025-01-08 22:26:53,758 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:53,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:26:53,766 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 4 equivalence classes. [2025-01-08 22:26:53,797 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:26:53,798 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-08 22:26:53,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:55,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:26:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348234806] [2025-01-08 22:26:55,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348234806] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:26:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773720719] [2025-01-08 22:26:55,445 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:26:55,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:26:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:26:55,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:26:55,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-08 22:26:55,486 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 4 equivalence classes. [2025-01-08 22:26:55,518 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:26:55,518 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-08 22:26:55,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:26:55,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-01-08 22:26:55,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:26:55,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:26:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:26:56,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:26:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-08 22:26:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773720719] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:26:58,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:26:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 26] total 81 [2025-01-08 22:26:58,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011350651] [2025-01-08 22:26:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:26:58,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2025-01-08 22:26:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:26:58,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2025-01-08 22:26:58,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=6245, Unknown=0, NotChecked=0, Total=6480 [2025-01-08 22:26:58,715 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:00,459 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2025-01-08 22:27:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-08 22:27:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-01-08 22:27:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:00,462 INFO L225 Difference]: With dead ends: 58 [2025-01-08 22:27:00,462 INFO L226 Difference]: Without dead ends: 55 [2025-01-08 22:27:00,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=360, Invalid=10146, Unknown=0, NotChecked=0, Total=10506 [2025-01-08 22:27:00,466 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:00,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-08 22:27:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-01-08 22:27:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2025-01-08 22:27:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2025-01-08 22:27:00,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 35 [2025-01-08 22:27:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:00,488 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2025-01-08 22:27:00,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2025-01-08 22:27:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-01-08 22:27:00,489 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:00,490 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:00,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-08 22:27:00,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-08 22:27:00,690 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:00,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -783060137, now seen corresponding path program 12 times [2025-01-08 22:27:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:00,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999378846] [2025-01-08 22:27:00,691 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:00,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:00,708 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 4 equivalence classes. [2025-01-08 22:27:00,729 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 36 of 36 statements. [2025-01-08 22:27:00,730 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-08 22:27:00,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-08 22:27:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999378846] [2025-01-08 22:27:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999378846] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166278910] [2025-01-08 22:27:01,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:01,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:01,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-08 22:27:01,129 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 4 equivalence classes. [2025-01-08 22:27:01,149 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 36 of 36 statements. [2025-01-08 22:27:01,149 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-08 22:27:01,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:01,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:27:01,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-08 22:27:01,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-08 22:27:01,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166278910] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:01,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:01,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:27:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984348338] [2025-01-08 22:27:01,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:01,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:27:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:01,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:27:01,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:27:01,454 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:01,644 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2025-01-08 22:27:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-08 22:27:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-01-08 22:27:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:01,644 INFO L225 Difference]: With dead ends: 102 [2025-01-08 22:27:01,644 INFO L226 Difference]: Without dead ends: 56 [2025-01-08 22:27:01,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:27:01,645 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:01,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:27:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-01-08 22:27:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2025-01-08 22:27:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2025-01-08 22:27:01,659 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 36 [2025-01-08 22:27:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:01,660 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2025-01-08 22:27:01,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2025-01-08 22:27:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-08 22:27:01,660 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:01,660 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:01,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-08 22:27:01,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:01,861 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:01,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash -250170960, now seen corresponding path program 13 times [2025-01-08 22:27:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:01,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740023880] [2025-01-08 22:27:01,861 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:01,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-08 22:27:01,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-08 22:27:01,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:01,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-08 22:27:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740023880] [2025-01-08 22:27:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740023880] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549490945] [2025-01-08 22:27:01,990 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:01,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:01,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:01,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-08 22:27:02,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-08 22:27:02,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-08 22:27:02,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:02,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:02,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:27:02,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-08 22:27:02,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-08 22:27:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549490945] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:02,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:02,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:27:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859435569] [2025-01-08 22:27:02,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:02,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:27:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:02,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:27:02,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:27:02,398 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:02,603 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2025-01-08 22:27:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-08 22:27:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-01-08 22:27:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:02,603 INFO L225 Difference]: With dead ends: 56 [2025-01-08 22:27:02,604 INFO L226 Difference]: Without dead ends: 41 [2025-01-08 22:27:02,604 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2025-01-08 22:27:02,604 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:02,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:27:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-01-08 22:27:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-01-08 22:27:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2025-01-08 22:27:02,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2025-01-08 22:27:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:02,615 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2025-01-08 22:27:02,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2025-01-08 22:27:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-08 22:27:02,615 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:02,615 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:02,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-08 22:27:02,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:02,820 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:02,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1836292329, now seen corresponding path program 14 times [2025-01-08 22:27:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336788126] [2025-01-08 22:27:02,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:27:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:02,827 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-01-08 22:27:02,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:27:02,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:27:02,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:04,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336788126] [2025-01-08 22:27:04,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336788126] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480046483] [2025-01-08 22:27:04,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:27:04,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:04,888 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-08 22:27:04,923 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-01-08 22:27:04,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:27:04,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:27:04,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:04,946 WARN L254 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 120 conjuncts are in the unsatisfiable core [2025-01-08 22:27:04,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:04,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:27:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:05,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:27:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480046483] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:07,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 30] total 80 [2025-01-08 22:27:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125606838] [2025-01-08 22:27:07,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:07,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2025-01-08 22:27:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:07,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2025-01-08 22:27:07,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=6025, Unknown=0, NotChecked=0, Total=6320 [2025-01-08 22:27:07,698 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:09,660 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2025-01-08 22:27:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-08 22:27:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-01-08 22:27:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:09,662 INFO L225 Difference]: With dead ends: 66 [2025-01-08 22:27:09,662 INFO L226 Difference]: Without dead ends: 63 [2025-01-08 22:27:09,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=478, Invalid=9028, Unknown=0, NotChecked=0, Total=9506 [2025-01-08 22:27:09,666 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:09,666 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-08 22:27:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-01-08 22:27:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2025-01-08 22:27:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2025-01-08 22:27:09,694 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 40 [2025-01-08 22:27:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:09,695 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2025-01-08 22:27:09,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2025-01-08 22:27:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:27:09,696 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:09,697 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:09,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-08 22:27:09,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-08 22:27:09,899 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:09,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -129687182, now seen corresponding path program 15 times [2025-01-08 22:27:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917707776] [2025-01-08 22:27:09,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:27:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:09,909 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 5 equivalence classes. [2025-01-08 22:27:09,931 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:27:09,932 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:27:09,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:10,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:10,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917707776] [2025-01-08 22:27:10,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917707776] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:10,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266795055] [2025-01-08 22:27:10,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:27:10,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:10,078 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:10,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-08 22:27:10,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 5 equivalence classes. [2025-01-08 22:27:10,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:27:10,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-08 22:27:10,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:10,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:27:10,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:10,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:10,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266795055] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:10,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:10,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-01-08 22:27:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108159441] [2025-01-08 22:27:10,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:10,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-08 22:27:10,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:10,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-08 22:27:10,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2025-01-08 22:27:10,398 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:10,731 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2025-01-08 22:27:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:27:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-01-08 22:27:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:10,735 INFO L225 Difference]: With dead ends: 107 [2025-01-08 22:27:10,735 INFO L226 Difference]: Without dead ends: 74 [2025-01-08 22:27:10,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2025-01-08 22:27:10,736 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:10,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:27:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-01-08 22:27:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2025-01-08 22:27:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2025-01-08 22:27:10,756 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 41 [2025-01-08 22:27:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:10,757 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2025-01-08 22:27:10,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2025-01-08 22:27:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:27:10,757 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:10,757 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:10,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-08 22:27:10,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-08 22:27:10,958 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:10,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1090549838, now seen corresponding path program 16 times [2025-01-08 22:27:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:10,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443790820] [2025-01-08 22:27:10,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:27:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:10,963 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-01-08 22:27:10,967 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 41 statements. [2025-01-08 22:27:10,968 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:27:10,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443790820] [2025-01-08 22:27:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443790820] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988296115] [2025-01-08 22:27:11,109 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:27:11,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:11,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:11,114 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:11,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-08 22:27:11,157 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-01-08 22:27:11,175 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 38 of 41 statements. [2025-01-08 22:27:11,175 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:27:11,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:11,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:27:11,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:11,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2025-01-08 22:27:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988296115] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:11,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-01-08 22:27:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369354727] [2025-01-08 22:27:11,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:11,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-08 22:27:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:11,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-08 22:27:11,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:27:11,393 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:11,574 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2025-01-08 22:27:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:27:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-01-08 22:27:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:11,575 INFO L225 Difference]: With dead ends: 102 [2025-01-08 22:27:11,575 INFO L226 Difference]: Without dead ends: 46 [2025-01-08 22:27:11,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-01-08 22:27:11,576 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:11,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:27:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-08 22:27:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-01-08 22:27:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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) [2025-01-08 22:27:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2025-01-08 22:27:11,589 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2025-01-08 22:27:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:11,589 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2025-01-08 22:27:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2025-01-08 22:27:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-08 22:27:11,590 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:11,590 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:11,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-08 22:27:11,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-08 22:27:11,794 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:11,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1215380242, now seen corresponding path program 17 times [2025-01-08 22:27:11,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533173264] [2025-01-08 22:27:11,795 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:27:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:11,799 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-01-08 22:27:11,834 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:27:11,834 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:27:11,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533173264] [2025-01-08 22:27:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533173264] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100280566] [2025-01-08 22:27:15,388 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:27:15,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:15,392 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:15,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-08 22:27:15,439 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 5 equivalence classes. [2025-01-08 22:27:15,505 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:27:15,505 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:27:15,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:15,508 WARN L254 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 135 conjuncts are in the unsatisfiable core [2025-01-08 22:27:15,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:15,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:27:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:18,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-08 22:27:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100280566] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 34] total 110 [2025-01-08 22:27:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061322376] [2025-01-08 22:27:21,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:21,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2025-01-08 22:27:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:21,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2025-01-08 22:27:21,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=11658, Unknown=0, NotChecked=0, Total=11990 [2025-01-08 22:27:21,834 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 110 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:26,444 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2025-01-08 22:27:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-01-08 22:27:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 110 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2025-01-08 22:27:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:26,445 INFO L225 Difference]: With dead ends: 74 [2025-01-08 22:27:26,445 INFO L226 Difference]: Without dead ends: 71 [2025-01-08 22:27:26,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3395 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=544, Invalid=20336, Unknown=0, NotChecked=0, Total=20880 [2025-01-08 22:27:26,447 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:26,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 239 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-01-08 22:27:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-08 22:27:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2025-01-08 22:27:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2025-01-08 22:27:26,471 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 45 [2025-01-08 22:27:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:26,471 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2025-01-08 22:27:26,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 110 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2025-01-08 22:27:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-08 22:27:26,472 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:26,472 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:26,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-08 22:27:26,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:26,672 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:26,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -781870281, now seen corresponding path program 18 times [2025-01-08 22:27:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:26,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871594725] [2025-01-08 22:27:26,677 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:26,686 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 5 equivalence classes. [2025-01-08 22:27:26,710 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:27:26,713 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:27:26,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-08 22:27:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871594725] [2025-01-08 22:27:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871594725] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950427132] [2025-01-08 22:27:26,975 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:27:26,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:26,980 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-08 22:27:27,023 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 5 equivalence classes. [2025-01-08 22:27:27,051 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:27:27,051 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:27:27,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:27,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-08 22:27:27,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-08 22:27:27,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-01-08 22:27:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950427132] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:27,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:27,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-01-08 22:27:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049328730] [2025-01-08 22:27:27,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:27,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:27:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:27,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:27:27,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:27:27,397 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:27,674 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2025-01-08 22:27:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-08 22:27:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 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 46 [2025-01-08 22:27:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:27,675 INFO L225 Difference]: With dead ends: 130 [2025-01-08 22:27:27,675 INFO L226 Difference]: Without dead ends: 70 [2025-01-08 22:27:27,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2025-01-08 22:27:27,677 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:27,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:27:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-01-08 22:27:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2025-01-08 22:27:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2025-01-08 22:27:27,701 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 46 [2025-01-08 22:27:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:27,702 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2025-01-08 22:27:27,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2025-01-08 22:27:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-08 22:27:27,702 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:27,702 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:27,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-08 22:27:27,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:27,903 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:27,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 491965776, now seen corresponding path program 19 times [2025-01-08 22:27:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:27,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498502872] [2025-01-08 22:27:27,904 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:27,909 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-08 22:27:27,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:27:27,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:27,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-01-08 22:27:28,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498502872] [2025-01-08 22:27:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498502872] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532921610] [2025-01-08 22:27:28,086 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:27:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:28,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:28,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-08 22:27:28,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-08 22:27:28,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:27:28,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:27:28,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:28,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-08 22:27:28,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-01-08 22:27:28,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-01-08 22:27:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532921610] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:28,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-01-08 22:27:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120051772] [2025-01-08 22:27:28,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:28,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:27:28,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:28,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:27:28,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:27:28,412 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:28,655 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2025-01-08 22:27:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:27:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-01-08 22:27:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:28,656 INFO L225 Difference]: With dead ends: 70 [2025-01-08 22:27:28,656 INFO L226 Difference]: Without dead ends: 51 [2025-01-08 22:27:28,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2025-01-08 22:27:28,657 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:28,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:27:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-01-08 22:27:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-01-08 22:27:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 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) [2025-01-08 22:27:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2025-01-08 22:27:28,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 47 [2025-01-08 22:27:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:28,672 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2025-01-08 22:27:28,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2025-01-08 22:27:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-08 22:27:28,673 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:28,673 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:28,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-01-08 22:27:28,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:28,875 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:28,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1442051977, now seen corresponding path program 20 times [2025-01-08 22:27:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:28,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395695518] [2025-01-08 22:27:28,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:27:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:28,885 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:27:28,919 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:27:28,919 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:27:28,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395695518] [2025-01-08 22:27:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395695518] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794694622] [2025-01-08 22:27:31,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:27:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:31,720 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-08 22:27:31,771 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:27:31,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:27:31,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:27:31,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:31,804 WARN L254 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 156 conjuncts are in the unsatisfiable core [2025-01-08 22:27:31,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:31,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:27:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:33,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:27:36,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794694622] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:36,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:36,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 38] total 103 [2025-01-08 22:27:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318103789] [2025-01-08 22:27:36,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:36,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-01-08 22:27:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:36,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-01-08 22:27:36,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=10113, Unknown=0, NotChecked=0, Total=10506 [2025-01-08 22:27:36,492 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 103 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:40,187 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2025-01-08 22:27:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-08 22:27:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 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 50 [2025-01-08 22:27:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:40,191 INFO L225 Difference]: With dead ends: 82 [2025-01-08 22:27:40,191 INFO L226 Difference]: Without dead ends: 79 [2025-01-08 22:27:40,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=680, Invalid=15322, Unknown=0, NotChecked=0, Total=16002 [2025-01-08 22:27:40,193 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 3431 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:40,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 207 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3431 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-01-08 22:27:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-01-08 22:27:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2025-01-08 22:27:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2025-01-08 22:27:40,217 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 50 [2025-01-08 22:27:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:40,218 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2025-01-08 22:27:40,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2025-01-08 22:27:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:27:40,218 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:40,218 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:40,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-01-08 22:27:40,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:40,423 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:40,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1547183250, now seen corresponding path program 21 times [2025-01-08 22:27:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:40,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874201084] [2025-01-08 22:27:40,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:27:40,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:40,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-01-08 22:27:40,457 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:27:40,458 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:27:40,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874201084] [2025-01-08 22:27:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874201084] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771846865] [2025-01-08 22:27:40,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:27:40,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:40,668 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:40,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-08 22:27:40,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 6 equivalence classes. [2025-01-08 22:27:40,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:27:40,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:27:40,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:40,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:27:40,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:40,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771846865] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:41,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:41,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-01-08 22:27:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308431626] [2025-01-08 22:27:41,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:41,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-08 22:27:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:41,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-08 22:27:41,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-01-08 22:27:41,071 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:41,510 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2025-01-08 22:27:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:27:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-01-08 22:27:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:41,511 INFO L225 Difference]: With dead ends: 133 [2025-01-08 22:27:41,511 INFO L226 Difference]: Without dead ends: 92 [2025-01-08 22:27:41,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2025-01-08 22:27:41,512 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:41,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:27:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-08 22:27:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2025-01-08 22:27:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2025-01-08 22:27:41,541 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 51 [2025-01-08 22:27:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:41,541 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2025-01-08 22:27:41,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2025-01-08 22:27:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:27:41,544 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:41,544 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:41,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-01-08 22:27:41,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-01-08 22:27:41,745 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:41,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1754000814, now seen corresponding path program 22 times [2025-01-08 22:27:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:41,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958048392] [2025-01-08 22:27:41,745 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:27:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:41,750 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:27:41,755 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-01-08 22:27:41,755 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:27:41,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:41,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958048392] [2025-01-08 22:27:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958048392] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109317313] [2025-01-08 22:27:41,940 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:27:41,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:41,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:41,942 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:41,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-08 22:27:41,995 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:27:42,015 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-01-08 22:27:42,016 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:27:42,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:42,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:27:42,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:42,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-01-08 22:27:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109317313] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:42,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2025-01-08 22:27:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644042261] [2025-01-08 22:27:42,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:42,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-08 22:27:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:42,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-08 22:27:42,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:27:42,317 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:27:42,582 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2025-01-08 22:27:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-08 22:27:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-01-08 22:27:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:27:42,582 INFO L225 Difference]: With dead ends: 126 [2025-01-08 22:27:42,582 INFO L226 Difference]: Without dead ends: 56 [2025-01-08 22:27:42,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2025-01-08 22:27:42,583 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:27:42,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:27:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-01-08 22:27:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-01-08 22:27:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2025-01-08 22:27:42,603 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 51 [2025-01-08 22:27:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:27:42,603 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2025-01-08 22:27:42,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:27:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2025-01-08 22:27:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-08 22:27:42,604 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:27:42,604 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:27:42,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-01-08 22:27:42,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-08 22:27:42,805 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:27:42,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:27:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -981286258, now seen corresponding path program 23 times [2025-01-08 22:27:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:27:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875330879] [2025-01-08 22:27:42,805 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:27:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:27:42,818 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 6 equivalence classes. [2025-01-08 22:27:42,914 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:27:42,914 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-08 22:27:42,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:27:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875330879] [2025-01-08 22:27:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875330879] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:27:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253246368] [2025-01-08 22:27:48,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:27:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:27:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:27:48,030 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:27:48,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-08 22:27:48,083 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 55 statements into 6 equivalence classes. [2025-01-08 22:27:48,313 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:27:48,314 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-08 22:27:48,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:27:48,318 WARN L254 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 171 conjuncts are in the unsatisfiable core [2025-01-08 22:27:48,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:27:48,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:27:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:27:53,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:27:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-08 22:27:58,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253246368] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:27:58,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:27:58,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 42] total 133 [2025-01-08 22:27:58,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504159106] [2025-01-08 22:27:58,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:27:58,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2025-01-08 22:27:58,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:27:58,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2025-01-08 22:27:58,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=17176, Unknown=0, NotChecked=0, Total=17556 [2025-01-08 22:27:58,461 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 133 states, 133 states have (on average 1.0751879699248121) internal successors, (143), 133 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)