./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/tcpy.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-tiling/tcpy.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 a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:20:04,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:20:04,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:20:04,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:20:04,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:20:04,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:20:04,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:20:04,470 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:20:04,470 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:20:04,470 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:20:04,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:20:04,471 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:20:04,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:20:04,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:20:04,472 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:20:04,473 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:20:04,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:20:04,473 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:20:04,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:20:04,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:20:04,475 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:20:04,475 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 -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2025-01-08 22:20:04,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:20:04,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:20:04,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:20:04,717 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:20:04,717 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:20:04,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2025-01-08 22:20:05,857 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/254ba75ff/372698c6b7254d5f8c7897c0f5291cab/FLAGf9bcc4f24 [2025-01-08 22:20:06,060 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:20:06,065 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2025-01-08 22:20:06,075 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/254ba75ff/372698c6b7254d5f8c7897c0f5291cab/FLAGf9bcc4f24 [2025-01-08 22:20:06,414 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/254ba75ff/372698c6b7254d5f8c7897c0f5291cab [2025-01-08 22:20:06,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:20:06,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:20:06,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:20:06,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:20:06,420 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:20:06,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e69d2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06, skipping insertion in model container [2025-01-08 22:20:06,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,429 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:20:06,521 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-tiling/tcpy.c[395,408] [2025-01-08 22:20:06,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:20:06,550 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:20:06,559 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-tiling/tcpy.c[395,408] [2025-01-08 22:20:06,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:20:06,576 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:20:06,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06 WrapperNode [2025-01-08 22:20:06,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:20:06,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:20:06,579 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:20:06,579 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:20:06,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,598 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2025-01-08 22:20:06,599 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:20:06,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:20:06,600 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:20:06,600 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:20:06,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,611 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,623 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 4, 3]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2025-01-08 22:20:06,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,629 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:20:06,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:20:06,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:20:06,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:20:06,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (1/1) ... [2025-01-08 22:20:06,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:20:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:06,667 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 22:20:06,670 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 22:20:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:20:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:20:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-08 22:20:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:20:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:20:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:20:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:20:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-08 22:20:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-08 22:20:06,753 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:20:06,754 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:20:06,879 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-01-08 22:20:06,879 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:20:06,888 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:20:06,889 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:20:06,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:20:06 BoogieIcfgContainer [2025-01-08 22:20:06,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:20:06,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:20:06,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:20:06,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:20:06,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:20:06" (1/3) ... [2025-01-08 22:20:06,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548eaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:20:06, skipping insertion in model container [2025-01-08 22:20:06,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:20:06" (2/3) ... [2025-01-08 22:20:06,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548eaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:20:06, skipping insertion in model container [2025-01-08 22:20:06,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:20:06" (3/3) ... [2025-01-08 22:20:06,896 INFO L128 eAbstractionObserver]: Analyzing ICFG tcpy.c [2025-01-08 22:20:06,905 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:20:06,906 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG tcpy.c that has 1 procedures, 17 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-08 22:20:06,943 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:20:06,950 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;@1ec7347c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:20:06,951 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:20:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-08 22:20:06,957 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:06,957 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:06,958 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:06,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1133956143, now seen corresponding path program 1 times [2025-01-08 22:20:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353180973] [2025-01-08 22:20:06,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:07,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-08 22:20:07,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-08 22:20:07,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:07,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:07,101 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 22:20:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353180973] [2025-01-08 22:20:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353180973] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:20:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:20:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-08 22:20:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844820587] [2025-01-08 22:20:07,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:20:07,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-08 22:20:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:07,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-08 22:20:07,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:20:07,125 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:20:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:07,132 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2025-01-08 22:20:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-08 22:20:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:20:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:07,137 INFO L225 Difference]: With dead ends: 28 [2025-01-08 22:20:07,137 INFO L226 Difference]: Without dead ends: 13 [2025-01-08 22:20:07,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:20:07,140 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:07,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:20:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-01-08 22:20:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-01-08 22:20:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 22:20:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-01-08 22:20:07,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2025-01-08 22:20:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:07,157 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-01-08 22:20:07,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:20:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-01-08 22:20:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-08 22:20:07,158 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:07,158 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:07,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:20:07,158 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:07,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1076697841, now seen corresponding path program 1 times [2025-01-08 22:20:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898273286] [2025-01-08 22:20:07,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:07,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-08 22:20:07,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-08 22:20:07,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:07,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:07,260 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 22:20:07,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898273286] [2025-01-08 22:20:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898273286] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:20:07,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:20:07,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:20:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091340245] [2025-01-08 22:20:07,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:20:07,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:20:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:07,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:20:07,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:20:07,263 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:07,280 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-01-08 22:20:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:20:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-08 22:20:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:07,280 INFO L225 Difference]: With dead ends: 23 [2025-01-08 22:20:07,281 INFO L226 Difference]: Without dead ends: 14 [2025-01-08 22:20:07,281 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 22:20:07,281 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:07,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:20:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-01-08 22:20:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-01-08 22:20:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 22:20:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-01-08 22:20:07,284 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2025-01-08 22:20:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:07,284 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-01-08 22:20:07,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-01-08 22:20:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-08 22:20:07,285 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:07,285 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:07,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:20:07,285 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:07,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash -27542764, now seen corresponding path program 1 times [2025-01-08 22:20:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:07,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138338540] [2025-01-08 22:20:07,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:07,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-08 22:20:07,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-08 22:20:07,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:07,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:07,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:07,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138338540] [2025-01-08 22:20:07,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138338540] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:07,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282758212] [2025-01-08 22:20:07,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:07,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:07,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:07,409 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 22:20:07,410 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 22:20:07,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-08 22:20:07,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-08 22:20:07,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:07,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:07,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:20:07,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:07,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:07,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282758212] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:07,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:07,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-08 22:20:07,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981028747] [2025-01-08 22:20:07,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:07,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-08 22:20:07,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:07,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-08 22:20:07,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:20:07,557 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:07,587 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-01-08 22:20:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:20:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-01-08 22:20:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:07,587 INFO L225 Difference]: With dead ends: 24 [2025-01-08 22:20:07,587 INFO L226 Difference]: Without dead ends: 15 [2025-01-08 22:20:07,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 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 22:20:07,588 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:07,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:20:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-01-08 22:20:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-01-08 22:20:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-01-08 22:20:07,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2025-01-08 22:20:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:07,591 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-01-08 22:20:07,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-01-08 22:20:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-08 22:20:07,591 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:07,591 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:07,598 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 22:20:07,791 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 22:20:07,792 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:07,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1863473745, now seen corresponding path program 2 times [2025-01-08 22:20:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:07,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925760135] [2025-01-08 22:20:07,793 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:07,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-01-08 22:20:07,807 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 13 statements. [2025-01-08 22:20:07,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-08 22:20:07,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:07,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:07,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925760135] [2025-01-08 22:20:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925760135] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:20:07,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:20:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-08 22:20:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291222779] [2025-01-08 22:20:07,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:20:07,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-08 22:20:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:07,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-08 22:20:07,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-08 22:20:07,928 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:07,959 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2025-01-08 22:20:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:20:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-01-08 22:20:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:07,960 INFO L225 Difference]: With dead ends: 26 [2025-01-08 22:20:07,960 INFO L226 Difference]: Without dead ends: 21 [2025-01-08 22:20:07,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-08 22:20:07,961 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:07,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:20:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-01-08 22:20:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2025-01-08 22:20:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2025-01-08 22:20:07,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2025-01-08 22:20:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:07,966 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2025-01-08 22:20:07,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2025-01-08 22:20:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-08 22:20:07,966 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:07,966 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:07,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-08 22:20:07,967 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:07,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1935080360, now seen corresponding path program 1 times [2025-01-08 22:20:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:07,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371387311] [2025-01-08 22:20:07,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:07,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-08 22:20:07,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:20:07,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:07,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371387311] [2025-01-08 22:20:08,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371387311] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960183269] [2025-01-08 22:20:08,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:08,356 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 22:20:08,358 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 22:20:08,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-08 22:20:08,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:20:08,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:08,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:08,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-08 22:20:08,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:08,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:20:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:08,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:08,846 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-01-08 22:20:08,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2025-01-08 22:20:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960183269] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:08,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 17 [2025-01-08 22:20:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488762336] [2025-01-08 22:20:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:08,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:20:08,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:08,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:20:08,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:20:08,872 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 22:20:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:09,016 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2025-01-08 22:20:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-08 22:20:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 14 [2025-01-08 22:20:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:09,017 INFO L225 Difference]: With dead ends: 21 [2025-01-08 22:20:09,017 INFO L226 Difference]: Without dead ends: 19 [2025-01-08 22:20:09,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2025-01-08 22:20:09,018 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:09,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:20:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-01-08 22:20:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2025-01-08 22:20:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 22:20:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2025-01-08 22:20:09,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2025-01-08 22:20:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:09,022 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2025-01-08 22:20:09,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 22:20:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2025-01-08 22:20:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-08 22:20:09,023 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:09,023 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:09,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:09,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:09,227 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:09,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash -923158421, now seen corresponding path program 1 times [2025-01-08 22:20:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445936001] [2025-01-08 22:20:09,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:09,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-08 22:20:09,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-08 22:20:09,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:09,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445936001] [2025-01-08 22:20:09,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445936001] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189121461] [2025-01-08 22:20:09,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:20:09,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:09,596 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 22:20:09,601 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 22:20:09,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-08 22:20:09,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-08 22:20:09,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:09,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:09,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-08 22:20:09,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:09,702 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 15 treesize of output 1 [2025-01-08 22:20:09,794 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 24 treesize of output 13 [2025-01-08 22:20:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:09,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:09,957 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 45 treesize of output 43 [2025-01-08 22:20:09,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2025-01-08 22:20:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189121461] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:10,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 31 [2025-01-08 22:20:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743884290] [2025-01-08 22:20:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:10,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-08 22:20:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:10,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-08 22:20:10,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2025-01-08 22:20:10,174 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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 22:20:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:10,532 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2025-01-08 22:20:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-08 22:20:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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 17 [2025-01-08 22:20:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:10,533 INFO L225 Difference]: With dead ends: 61 [2025-01-08 22:20:10,533 INFO L226 Difference]: Without dead ends: 53 [2025-01-08 22:20:10,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2025-01-08 22:20:10,534 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:10,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 109 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:20:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-01-08 22:20:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2025-01-08 22:20:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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 22:20:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2025-01-08 22:20:10,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 17 [2025-01-08 22:20:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:10,541 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2025-01-08 22:20:10,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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 22:20:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2025-01-08 22:20:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-08 22:20:10,542 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:10,542 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:10,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-08 22:20:10,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:10,746 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:10,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1695973109, now seen corresponding path program 2 times [2025-01-08 22:20:10,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894281187] [2025-01-08 22:20:10,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:10,754 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-08 22:20:10,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-08 22:20:10,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:10,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:20:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894281187] [2025-01-08 22:20:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894281187] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524770908] [2025-01-08 22:20:10,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:10,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:10,955 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 22:20:10,957 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 22:20:10,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-08 22:20:11,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-08 22:20:11,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:11,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:11,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-08 22:20:11,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:20:11,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:20:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524770908] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:11,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:11,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-01-08 22:20:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853255033] [2025-01-08 22:20:11,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:11,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-08 22:20:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:11,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-08 22:20:11,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:20:11,382 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:11,619 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2025-01-08 22:20:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-08 22:20:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-01-08 22:20:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:11,620 INFO L225 Difference]: With dead ends: 72 [2025-01-08 22:20:11,620 INFO L226 Difference]: Without dead ends: 62 [2025-01-08 22:20:11,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:20:11,621 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:11,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 132 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:20:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-01-08 22:20:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2025-01-08 22:20:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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 22:20:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2025-01-08 22:20:11,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2025-01-08 22:20:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:11,631 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2025-01-08 22:20:11,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2025-01-08 22:20:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-08 22:20:11,632 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:11,632 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:11,638 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 22:20:11,832 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,SelfDestructingSolverStorable6 [2025-01-08 22:20:11,832 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:11,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash 288155124, now seen corresponding path program 3 times [2025-01-08 22:20:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424365756] [2025-01-08 22:20:11,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:11,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-01-08 22:20:11,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 20 statements. [2025-01-08 22:20:11,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:20:11,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:20:12,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424365756] [2025-01-08 22:20:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424365756] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339294383] [2025-01-08 22:20:12,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:12,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:12,057 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 22:20:12,058 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 22:20:12,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-01-08 22:20:12,120 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 20 statements. [2025-01-08 22:20:12,120 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:20:12,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:12,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-08 22:20:12,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:12,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:20:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:20:12,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:12,447 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-01-08 22:20:12,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2025-01-08 22:20:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:20:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339294383] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:12,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 23 [2025-01-08 22:20:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558068616] [2025-01-08 22:20:12,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:12,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:20:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:12,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:20:12,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:20:12,484 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 22:20:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:12,716 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2025-01-08 22:20:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-08 22:20:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 20 [2025-01-08 22:20:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:12,717 INFO L225 Difference]: With dead ends: 54 [2025-01-08 22:20:12,717 INFO L226 Difference]: Without dead ends: 52 [2025-01-08 22:20:12,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:20:12,718 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:12,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:20:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-01-08 22:20:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2025-01-08 22:20:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 22:20:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2025-01-08 22:20:12,723 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2025-01-08 22:20:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:12,723 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2025-01-08 22:20:12,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 22:20:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2025-01-08 22:20:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-08 22:20:12,724 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:12,724 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:12,730 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 22:20:12,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:12,925 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:12,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1132124296, now seen corresponding path program 4 times [2025-01-08 22:20:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:12,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5176297] [2025-01-08 22:20:12,925 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:12,931 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-08 22:20:12,934 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 20 statements. [2025-01-08 22:20:12,935 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:12,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5176297] [2025-01-08 22:20:13,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5176297] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936446625] [2025-01-08 22:20:13,014 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:13,016 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 22:20:13,021 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 22:20:13,059 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-08 22:20:13,067 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 20 statements. [2025-01-08 22:20:13,067 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:13,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:13,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:20:13,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:13,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-08 22:20:13,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936446625] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:13,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:13,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-01-08 22:20:13,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272433388] [2025-01-08 22:20:13,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:13,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:20:13,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:13,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:20:13,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:20:13,302 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 22:20:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:13,397 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2025-01-08 22:20:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-08 22:20:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-01-08 22:20:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:13,398 INFO L225 Difference]: With dead ends: 41 [2025-01-08 22:20:13,398 INFO L226 Difference]: Without dead ends: 24 [2025-01-08 22:20:13,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-01-08 22:20:13,398 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:13,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:20:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-08 22:20:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2025-01-08 22:20:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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 22:20:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-01-08 22:20:13,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2025-01-08 22:20:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:13,403 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-01-08 22:20:13,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 22:20:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-01-08 22:20:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-08 22:20:13,403 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:13,403 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:13,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:13,604 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,SelfDestructingSolverStorable8 [2025-01-08 22:20:13,604 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:13,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 888634484, now seen corresponding path program 5 times [2025-01-08 22:20:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812823644] [2025-01-08 22:20:13,605 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:13,611 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-08 22:20:13,619 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-08 22:20:13,622 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:20:13,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812823644] [2025-01-08 22:20:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812823644] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385057598] [2025-01-08 22:20:13,721 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:13,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:13,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:13,722 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 22:20:13,726 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 22:20:13,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-01-08 22:20:13,785 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-01-08 22:20:13,785 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-08 22:20:13,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:13,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-08 22:20:13,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:13,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385057598] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:13,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:13,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-01-08 22:20:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349883438] [2025-01-08 22:20:13,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:13,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:20:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:13,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:20:13,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:20:13,939 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 22:20:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:14,010 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2025-01-08 22:20:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-08 22:20:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-01-08 22:20:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:14,010 INFO L225 Difference]: With dead ends: 47 [2025-01-08 22:20:14,010 INFO L226 Difference]: Without dead ends: 31 [2025-01-08 22:20:14,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2025-01-08 22:20:14,011 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:14,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:20:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-08 22:20:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2025-01-08 22:20:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2025-01-08 22:20:14,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2025-01-08 22:20:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:14,016 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2025-01-08 22:20:14,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 22:20:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2025-01-08 22:20:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-08 22:20:14,017 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:14,017 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:14,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:14,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:14,217 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:14,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1205526193, now seen corresponding path program 6 times [2025-01-08 22:20:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671968641] [2025-01-08 22:20:14,219 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:14,231 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-01-08 22:20:14,245 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-01-08 22:20:14,245 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:20:14,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:14,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:14,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671968641] [2025-01-08 22:20:14,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671968641] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:14,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200213489] [2025-01-08 22:20:14,693 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:14,696 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 22:20:14,698 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 22:20:14,741 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-01-08 22:20:14,760 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-01-08 22:20:14,760 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-08 22:20:14,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:14,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:20:14,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:14,824 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 15 treesize of output 1 [2025-01-08 22:20:14,848 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 15 treesize of output 1 [2025-01-08 22:20:14,960 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 28 treesize of output 13 [2025-01-08 22:20:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:15,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:15,209 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 45 treesize of output 43 [2025-01-08 22:20:15,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2025-01-08 22:20:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:15,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200213489] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:15,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:15,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 43 [2025-01-08 22:20:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483627118] [2025-01-08 22:20:15,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:15,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-01-08 22:20:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:15,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-01-08 22:20:15,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2025-01-08 22:20:15,505 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:16,530 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2025-01-08 22:20:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-08 22:20:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-01-08 22:20:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:16,531 INFO L225 Difference]: With dead ends: 101 [2025-01-08 22:20:16,531 INFO L226 Difference]: Without dead ends: 90 [2025-01-08 22:20:16,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=4464, Unknown=0, NotChecked=0, Total=5402 [2025-01-08 22:20:16,532 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:16,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 206 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:20:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-01-08 22:20:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 43. [2025-01-08 22:20:16,559 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 22:20:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2025-01-08 22:20:16,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 23 [2025-01-08 22:20:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:16,560 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2025-01-08 22:20:16,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2025-01-08 22:20:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-08 22:20:16,560 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:16,560 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:16,566 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 22:20:16,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:16,765 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:16,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 151253487, now seen corresponding path program 7 times [2025-01-08 22:20:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030780497] [2025-01-08 22:20:16,766 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:20:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:16,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:20:16,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:20:16,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:16,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030780497] [2025-01-08 22:20:16,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030780497] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908221394] [2025-01-08 22:20:16,973 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:20:16,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:16,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:16,977 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 22:20:16,980 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 22:20:17,023 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-08 22:20:17,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-08 22:20:17,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:17,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:17,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-08 22:20:17,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:17,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-08 22:20:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908221394] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:17,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:17,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2025-01-08 22:20:17,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683067167] [2025-01-08 22:20:17,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:17,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-08 22:20:17,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:17,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-08 22:20:17,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2025-01-08 22:20:17,471 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:17,790 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2025-01-08 22:20:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-08 22:20:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-08 22:20:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:17,791 INFO L225 Difference]: With dead ends: 104 [2025-01-08 22:20:17,792 INFO L226 Difference]: Without dead ends: 91 [2025-01-08 22:20:17,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1240, Unknown=0, NotChecked=0, Total=1640 [2025-01-08 22:20:17,792 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:17,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 161 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:20:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-08 22:20:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 45. [2025-01-08 22:20:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2025-01-08 22:20:17,805 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 25 [2025-01-08 22:20:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:17,806 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2025-01-08 22:20:17,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2025-01-08 22:20:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-08 22:20:17,807 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:17,807 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:17,813 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 22:20:18,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:18,008 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:18,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1377489640, now seen corresponding path program 8 times [2025-01-08 22:20:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634864401] [2025-01-08 22:20:18,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:18,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-08 22:20:18,025 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:20:18,025 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:18,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:20:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:18,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634864401] [2025-01-08 22:20:18,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634864401] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:18,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339911868] [2025-01-08 22:20:18,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:18,271 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 22:20:18,276 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 22:20:18,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-01-08 22:20:18,342 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:20:18,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:18,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:18,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-01-08 22:20:18,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:18,398 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 15 treesize of output 1 [2025-01-08 22:20:18,419 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 19 treesize of output 1 [2025-01-08 22:20:18,440 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 19 treesize of output 1 [2025-01-08 22:20:18,466 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 19 treesize of output 1 [2025-01-08 22:20:18,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:20:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:18,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:18,889 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 53 treesize of output 51 [2025-01-08 22:20:18,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 214 [2025-01-08 22:20:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:20:18,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339911868] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:18,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:18,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 10] total 35 [2025-01-08 22:20:18,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315423062] [2025-01-08 22:20:18,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:18,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-08 22:20:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:18,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-08 22:20:18,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2025-01-08 22:20:18,952 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:20:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:19,550 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2025-01-08 22:20:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:20:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 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 22:20:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:19,551 INFO L225 Difference]: With dead ends: 94 [2025-01-08 22:20:19,551 INFO L226 Difference]: Without dead ends: 92 [2025-01-08 22:20:19,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=1696, Unknown=0, NotChecked=0, Total=1980 [2025-01-08 22:20:19,552 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:19,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 390 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:20:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-08 22:20:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 35. [2025-01-08 22:20:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 22:20:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2025-01-08 22:20:19,564 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2025-01-08 22:20:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:19,565 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2025-01-08 22:20:19,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:20:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2025-01-08 22:20:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-08 22:20:19,566 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:19,566 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:19,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-08 22:20:19,766 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,SelfDestructingSolverStorable12 [2025-01-08 22:20:19,766 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:19,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash 690512916, now seen corresponding path program 9 times [2025-01-08 22:20:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14832882] [2025-01-08 22:20:19,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:19,775 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-01-08 22:20:19,803 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:20:19,803 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:20:19,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:20:20,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14832882] [2025-01-08 22:20:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14832882] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558157259] [2025-01-08 22:20:20,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:20,452 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 22:20:20,453 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 22:20:20,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-01-08 22:20:20,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-01-08 22:20:20,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-08 22:20:20,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:20,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-01-08 22:20:20,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:20,614 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 15 treesize of output 1 [2025-01-08 22:20:20,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2025-01-08 22:20:20,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2025-01-08 22:20:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:20,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:21,145 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 76 treesize of output 74 [2025-01-08 22:20:21,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1574 treesize of output 1558 [2025-01-08 22:20:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:21,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558157259] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:21,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:21,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18] total 45 [2025-01-08 22:20:21,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956318801] [2025-01-08 22:20:21,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:21,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-01-08 22:20:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:21,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-01-08 22:20:21,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2025-01-08 22:20:21,481 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 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 22:20:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:23,002 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2025-01-08 22:20:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-01-08 22:20:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 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) Word has length 26 [2025-01-08 22:20:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:23,003 INFO L225 Difference]: With dead ends: 137 [2025-01-08 22:20:23,003 INFO L226 Difference]: Without dead ends: 98 [2025-01-08 22:20:23,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1274, Invalid=6208, Unknown=0, NotChecked=0, Total=7482 [2025-01-08 22:20:23,005 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 274 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:23,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 300 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:20:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-08 22:20:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 36. [2025-01-08 22:20:23,017 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 22:20:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2025-01-08 22:20:23,017 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2025-01-08 22:20:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:23,018 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2025-01-08 22:20:23,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 45 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 22:20:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2025-01-08 22:20:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-08 22:20:23,019 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:23,019 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:23,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-08 22:20:23,224 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,SelfDestructingSolverStorable13 [2025-01-08 22:20:23,224 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:23,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1623447467, now seen corresponding path program 10 times [2025-01-08 22:20:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146604869] [2025-01-08 22:20:23,225 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:23,233 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-08 22:20:23,236 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 29 statements. [2025-01-08 22:20:23,236 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:23,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:20:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146604869] [2025-01-08 22:20:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146604869] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630338181] [2025-01-08 22:20:23,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:23,534 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 22:20:23,535 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 22:20:23,589 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-01-08 22:20:23,599 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 29 statements. [2025-01-08 22:20:23,599 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:23,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:23,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-08 22:20:23,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:23,688 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-01-08 22:20:23,688 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 1 case distinctions, treesize of input 36 treesize of output 21 [2025-01-08 22:20:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:20:23,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:24,041 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-01-08 22:20:24,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 33 [2025-01-08 22:20:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-08 22:20:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630338181] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:24,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2025-01-08 22:20:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464714211] [2025-01-08 22:20:24,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:24,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-08 22:20:24,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:24,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-08 22:20:24,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-01-08 22:20:24,167 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:24,935 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2025-01-08 22:20:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-08 22:20:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2025-01-08 22:20:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:24,936 INFO L225 Difference]: With dead ends: 78 [2025-01-08 22:20:24,936 INFO L226 Difference]: Without dead ends: 76 [2025-01-08 22:20:24,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2025-01-08 22:20:24,937 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:24,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 157 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:20:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-01-08 22:20:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2025-01-08 22:20:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2025-01-08 22:20:24,967 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 29 [2025-01-08 22:20:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:24,967 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2025-01-08 22:20:24,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2025-01-08 22:20:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-08 22:20:24,967 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:24,967 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:24,979 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 22:20:25,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:25,168 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:25,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1498431432, now seen corresponding path program 11 times [2025-01-08 22:20:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:25,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508699923] [2025-01-08 22:20:25,169 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:25,177 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 5 equivalence classes. [2025-01-08 22:20:25,197 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:20:25,198 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:20:25,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508699923] [2025-01-08 22:20:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508699923] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351145000] [2025-01-08 22:20:25,909 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:25,911 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 22:20:25,914 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 22:20:25,970 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 5 equivalence classes. [2025-01-08 22:20:26,073 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 32 of 32 statements. [2025-01-08 22:20:26,073 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-08 22:20:26,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:26,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-01-08 22:20:26,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:26,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2025-01-08 22:20:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:26,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2025-01-08 22:20:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:26,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:27,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:20:27,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 67 [2025-01-08 22:20:27,077 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 46 treesize of output 44 [2025-01-08 22:20:27,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4150 treesize of output 4086 [2025-01-08 22:20:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351145000] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:27,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:27,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2025-01-08 22:20:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714867360] [2025-01-08 22:20:27,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:27,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-08 22:20:27,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:27,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-08 22:20:27,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2812, Unknown=0, NotChecked=0, Total=3192 [2025-01-08 22:20:27,599 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 57 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:28,815 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2025-01-08 22:20:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-01-08 22:20:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 57 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-01-08 22:20:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:28,816 INFO L225 Difference]: With dead ends: 100 [2025-01-08 22:20:28,816 INFO L226 Difference]: Without dead ends: 98 [2025-01-08 22:20:28,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=931, Invalid=5549, Unknown=0, NotChecked=0, Total=6480 [2025-01-08 22:20:28,818 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 339 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:28,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 249 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:20:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-08 22:20:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2025-01-08 22:20:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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 22:20:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2025-01-08 22:20:28,839 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 32 [2025-01-08 22:20:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:28,839 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2025-01-08 22:20:28,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 57 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2025-01-08 22:20:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-01-08 22:20:28,840 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:28,840 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:28,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:29,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:29,044 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:29,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2124083339, now seen corresponding path program 12 times [2025-01-08 22:20:29,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:29,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458095395] [2025-01-08 22:20:29,045 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:29,052 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 6 equivalence classes. [2025-01-08 22:20:29,077 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:20:29,077 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-08 22:20:29,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:20:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458095395] [2025-01-08 22:20:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458095395] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594127445] [2025-01-08 22:20:29,878 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:29,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:29,881 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 22:20:29,882 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 22:20:29,943 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 6 equivalence classes. [2025-01-08 22:20:30,029 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-01-08 22:20:30,030 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-08 22:20:30,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:30,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-01-08 22:20:30,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:30,154 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 19 treesize of output 1 [2025-01-08 22:20:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:30,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2025-01-08 22:20:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:30,347 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2025-01-08 22:20:30,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2025-01-08 22:20:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:30,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:30,420 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2025-01-08 22:20:30,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2025-01-08 22:20:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:31,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:31,403 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 107 treesize of output 105 [2025-01-08 22:20:31,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3412478 treesize of output 3404286 [2025-01-08 22:20:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594127445] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:32,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 58 [2025-01-08 22:20:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765723048] [2025-01-08 22:20:32,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:32,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-01-08 22:20:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:32,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-01-08 22:20:32,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=2652, Unknown=0, NotChecked=0, Total=3306 [2025-01-08 22:20:32,047 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 22:20:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:36,081 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2025-01-08 22:20:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-01-08 22:20:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 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 22:20:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:36,083 INFO L225 Difference]: With dead ends: 239 [2025-01-08 22:20:36,083 INFO L226 Difference]: Without dead ends: 157 [2025-01-08 22:20:36,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6284 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4410, Invalid=14496, Unknown=0, NotChecked=0, Total=18906 [2025-01-08 22:20:36,086 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 719 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:36,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 186 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:20:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-01-08 22:20:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 72. [2025-01-08 22:20:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 22:20:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2025-01-08 22:20:36,121 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 35 [2025-01-08 22:20:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:36,122 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2025-01-08 22:20:36,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 22:20:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2025-01-08 22:20:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-08 22:20:36,126 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:36,126 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:36,132 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 22:20:36,329 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,SelfDestructingSolverStorable16 [2025-01-08 22:20:36,329 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:36,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1134827176, now seen corresponding path program 13 times [2025-01-08 22:20:36,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:36,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064388963] [2025-01-08 22:20:36,330 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:20:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:36,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-08 22:20:36,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-08 22:20:36,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:36,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-08 22:20:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064388963] [2025-01-08 22:20:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064388963] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896698431] [2025-01-08 22:20:36,747 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:20:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:36,749 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 22:20:36,750 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 22:20:36,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-08 22:20:36,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-08 22:20:36,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:20:36,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:36,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:20:36,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-08 22:20:37,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-08 22:20:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896698431] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:37,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:37,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 54 [2025-01-08 22:20:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235501472] [2025-01-08 22:20:37,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:37,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-08 22:20:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:37,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-08 22:20:37,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=2270, Unknown=0, NotChecked=0, Total=2862 [2025-01-08 22:20:37,543 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:38,151 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2025-01-08 22:20:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-01-08 22:20:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-01-08 22:20:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:38,153 INFO L225 Difference]: With dead ends: 220 [2025-01-08 22:20:38,153 INFO L226 Difference]: Without dead ends: 180 [2025-01-08 22:20:38,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1231, Invalid=3881, Unknown=0, NotChecked=0, Total=5112 [2025-01-08 22:20:38,154 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 313 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:38,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 196 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:20:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-01-08 22:20:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 78. [2025-01-08 22:20:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 77 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2025-01-08 22:20:38,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 38 [2025-01-08 22:20:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:38,188 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2025-01-08 22:20:38,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2025-01-08 22:20:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-08 22:20:38,189 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:38,189 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:38,195 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 22:20:38,393 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,SelfDestructingSolverStorable17 [2025-01-08 22:20:38,393 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:38,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1228020532, now seen corresponding path program 14 times [2025-01-08 22:20:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:38,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146462186] [2025-01-08 22:20:38,394 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:38,402 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-01-08 22:20:38,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:20:38,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:38,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:20:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146462186] [2025-01-08 22:20:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146462186] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150220171] [2025-01-08 22:20:38,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:20:38,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:38,777 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 22:20:38,779 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 22:20:38,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-01-08 22:20:38,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:20:38,873 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:20:38,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:38,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-08 22:20:38,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:20:39,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:20:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150220171] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:39,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2025-01-08 22:20:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333009652] [2025-01-08 22:20:39,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:39,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-01-08 22:20:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:39,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-01-08 22:20:39,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2025-01-08 22:20:39,677 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 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 22:20:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:40,206 INFO L93 Difference]: Finished difference Result 188 states and 205 transitions. [2025-01-08 22:20:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-01-08 22:20:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 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 40 [2025-01-08 22:20:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:40,208 INFO L225 Difference]: With dead ends: 188 [2025-01-08 22:20:40,208 INFO L226 Difference]: Without dead ends: 166 [2025-01-08 22:20:40,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=970, Invalid=2936, Unknown=0, NotChecked=0, Total=3906 [2025-01-08 22:20:40,209 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 218 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:40,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 335 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:20:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-01-08 22:20:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 78. [2025-01-08 22:20:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2025-01-08 22:20:40,240 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 40 [2025-01-08 22:20:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:40,240 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2025-01-08 22:20:40,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 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 22:20:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2025-01-08 22:20:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:20:40,241 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:40,241 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:40,247 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 22:20:40,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:40,442 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:40,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1415395051, now seen corresponding path program 15 times [2025-01-08 22:20:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:40,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791742252] [2025-01-08 22:20:40,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:40,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:40,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-01-08 22:20:40,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:20:40,513 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:20:40,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:20:41,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791742252] [2025-01-08 22:20:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791742252] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155488843] [2025-01-08 22:20:41,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:20:41,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:41,143 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 22:20:41,144 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 22:20:41,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-01-08 22:20:41,498 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:20:41,498 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:20:41,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:41,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-08 22:20:41,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:41,542 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 19 treesize of output 1 [2025-01-08 22:20:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:41,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2025-01-08 22:20:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:20:41,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:42,199 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 45 treesize of output 43 [2025-01-08 22:20:42,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2025-01-08 22:20:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:20:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155488843] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:42,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 44 [2025-01-08 22:20:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903287792] [2025-01-08 22:20:42,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:42,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-08 22:20:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:42,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-08 22:20:42,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2025-01-08 22:20:42,542 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:43,581 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2025-01-08 22:20:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-08 22:20:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-01-08 22:20:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:43,582 INFO L225 Difference]: With dead ends: 173 [2025-01-08 22:20:43,582 INFO L226 Difference]: Without dead ends: 171 [2025-01-08 22:20:43,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2025-01-08 22:20:43,583 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:43,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 406 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:20:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-01-08 22:20:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 68. [2025-01-08 22:20:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 22:20:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2025-01-08 22:20:43,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 41 [2025-01-08 22:20:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:43,613 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2025-01-08 22:20:43,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2025-01-08 22:20:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:20:43,613 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:43,613 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:43,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:43,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:43,818 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:43,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash -823329937, now seen corresponding path program 16 times [2025-01-08 22:20:43,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:43,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704630317] [2025-01-08 22:20:43,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:43,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:43,827 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-01-08 22:20:43,833 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 30 of 41 statements. [2025-01-08 22:20:43,833 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:43,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:20:44,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704630317] [2025-01-08 22:20:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704630317] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571142629] [2025-01-08 22:20:44,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:20:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:44,281 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 22:20:44,283 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 22:20:44,361 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-01-08 22:20:44,376 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 30 of 41 statements. [2025-01-08 22:20:44,377 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:20:44,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:44,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:20:44,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:44,487 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-01-08 22:20:44,487 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 1 case distinctions, treesize of input 36 treesize of output 21 [2025-01-08 22:20:44,533 INFO L349 Elim1Store]: treesize reduction 50, result has 43.2 percent of original size [2025-01-08 22:20:44,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 50 [2025-01-08 22:20:44,593 INFO L349 Elim1Store]: treesize reduction 81, result has 36.2 percent of original size [2025-01-08 22:20:44,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 74 [2025-01-08 22:20:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:20:45,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:45,592 INFO L349 Elim1Store]: treesize reduction 39, result has 31.6 percent of original size [2025-01-08 22:20:45,592 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 111 treesize of output 86 [2025-01-08 22:20:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:20:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571142629] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:45,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:45,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 43 [2025-01-08 22:20:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846957664] [2025-01-08 22:20:45,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:45,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-01-08 22:20:45,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:45,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-01-08 22:20:45,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2025-01-08 22:20:45,677 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:48,108 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2025-01-08 22:20:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-01-08 22:20:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-01-08 22:20:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:48,109 INFO L225 Difference]: With dead ends: 147 [2025-01-08 22:20:48,109 INFO L226 Difference]: Without dead ends: 145 [2025-01-08 22:20:48,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1166, Invalid=6316, Unknown=0, NotChecked=0, Total=7482 [2025-01-08 22:20:48,110 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 249 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:48,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 175 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:20:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-01-08 22:20:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2025-01-08 22:20:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 94 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 22:20:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2025-01-08 22:20:48,162 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 41 [2025-01-08 22:20:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:48,162 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2025-01-08 22:20:48,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:20:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2025-01-08 22:20:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-08 22:20:48,163 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:48,163 INFO L218 NwaCegarLoop]: trace histogram [14, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:48,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-08 22:20:48,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:48,363 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:48,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1454076792, now seen corresponding path program 17 times [2025-01-08 22:20:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616439747] [2025-01-08 22:20:48,364 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:48,374 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 8 equivalence classes. [2025-01-08 22:20:48,396 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:20:48,396 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:20:48,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-08 22:20:49,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616439747] [2025-01-08 22:20:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616439747] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917537442] [2025-01-08 22:20:49,109 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:20:49,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:49,111 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 22:20:49,112 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 22:20:49,200 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 8 equivalence classes. [2025-01-08 22:20:51,590 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:20:51,590 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:20:51,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:51,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 88 conjuncts are in the unsatisfiable core [2025-01-08 22:20:51,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:51,712 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 15 treesize of output 1 [2025-01-08 22:20:51,736 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 15 treesize of output 1 [2025-01-08 22:20:51,770 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 15 treesize of output 1 [2025-01-08 22:20:51,807 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 15 treesize of output 1 [2025-01-08 22:20:51,837 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 15 treesize of output 1 [2025-01-08 22:20:51,865 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 15 treesize of output 1 [2025-01-08 22:20:51,893 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 19 treesize of output 1 [2025-01-08 22:20:51,924 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 19 treesize of output 1 [2025-01-08 22:20:51,956 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 19 treesize of output 1 [2025-01-08 22:20:51,989 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 19 treesize of output 1 [2025-01-08 22:20:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:20:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:20:52,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 56 [2025-01-08 22:20:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:52,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:20:52,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 78 [2025-01-08 22:20:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:20:52,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:20:53,093 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 115 treesize of output 113 [2025-01-08 22:20:53,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104742 treesize of output 104486 [2025-01-08 22:20:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:20:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917537442] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:20:53,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:20:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 16] total 58 [2025-01-08 22:20:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139366789] [2025-01-08 22:20:53,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:20:53,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-01-08 22:20:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:20:53,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-01-08 22:20:53,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2025-01-08 22:20:53,448 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 22:20:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:20:56,797 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2025-01-08 22:20:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-01-08 22:20:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-01-08 22:20:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:20:56,800 INFO L225 Difference]: With dead ends: 210 [2025-01-08 22:20:56,800 INFO L226 Difference]: Without dead ends: 185 [2025-01-08 22:20:56,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=693, Invalid=8813, Unknown=0, NotChecked=0, Total=9506 [2025-01-08 22:20:56,805 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 263 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 3828 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 3907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:20:56,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1542 Invalid, 3907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3828 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-01-08 22:20:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-01-08 22:20:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 95. [2025-01-08 22:20:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 22:20:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2025-01-08 22:20:56,871 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 44 [2025-01-08 22:20:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:20:56,871 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2025-01-08 22:20:56,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 22:20:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2025-01-08 22:20:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-08 22:20:56,872 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:20:56,872 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:20:56,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-08 22:20:57,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:57,073 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:20:57,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:20:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash 740873716, now seen corresponding path program 18 times [2025-01-08 22:20:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:20:57,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518802381] [2025-01-08 22:20:57,073 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:57,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:20:57,088 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 8 equivalence classes. [2025-01-08 22:20:57,118 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:20:57,118 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:20:57,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 68 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:20:58,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:20:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518802381] [2025-01-08 22:20:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518802381] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:20:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086861434] [2025-01-08 22:20:58,499 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:20:58,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:20:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:20:58,502 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 22:20:58,503 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 22:20:58,593 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 8 equivalence classes. [2025-01-08 22:20:58,869 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:20:58,869 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:20:58,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:20:58,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-01-08 22:20:58,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:20:58,906 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 19 treesize of output 1 [2025-01-08 22:20:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:58,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2025-01-08 22:20:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:59,048 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2025-01-08 22:20:59,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2025-01-08 22:20:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:59,110 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2025-01-08 22:20:59,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 72 [2025-01-08 22:20:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:20:59,196 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2025-01-08 22:20:59,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 102 [2025-01-08 22:21:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-08 22:21:00,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:00,949 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 138 treesize of output 136 [2025-01-08 22:21:01,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1746490394 treesize of output 1745441818 [2025-01-08 22:21:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-08 22:21:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086861434] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:04,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 17] total 53 [2025-01-08 22:21:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646893168] [2025-01-08 22:21:04,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:04,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-01-08 22:21:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:04,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-01-08 22:21:04,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=2304, Unknown=0, NotChecked=0, Total=2756 [2025-01-08 22:21:04,225 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:21:06,660 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2025-01-08 22:21:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-01-08 22:21:06,660 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-01-08 22:21:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:21:06,661 INFO L225 Difference]: With dead ends: 161 [2025-01-08 22:21:06,661 INFO L226 Difference]: Without dead ends: 107 [2025-01-08 22:21:06,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1408, Invalid=6782, Unknown=0, NotChecked=0, Total=8190 [2025-01-08 22:21:06,667 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:21:06,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 201 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:21:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-01-08 22:21:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2025-01-08 22:21:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 87 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2025-01-08 22:21:06,768 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 44 [2025-01-08 22:21:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:21:06,768 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2025-01-08 22:21:06,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2025-01-08 22:21:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-08 22:21:06,769 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:21:06,769 INFO L218 NwaCegarLoop]: trace histogram [14, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:21:06,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-08 22:21:06,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:06,973 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:21:06,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:21:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -633637557, now seen corresponding path program 19 times [2025-01-08 22:21:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:21:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453570392] [2025-01-08 22:21:06,974 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:21:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:21:06,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-08 22:21:07,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:21:07,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:21:07,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:21:08,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:21:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453570392] [2025-01-08 22:21:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453570392] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:21:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285999444] [2025-01-08 22:21:08,460 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:21:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:21:08,462 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 22:21:08,463 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 22:21:08,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-08 22:21:08,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:21:08,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:21:08,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:08,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-01-08 22:21:08,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:21:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:09,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:21:09,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:09,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:21:09,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 56 [2025-01-08 22:21:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:21:09,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:10,349 INFO L349 Elim1Store]: treesize reduction 5, result has 90.6 percent of original size [2025-01-08 22:21:10,349 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 84 treesize of output 94 [2025-01-08 22:21:10,353 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 46 treesize of output 44 [2025-01-08 22:21:10,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1746 treesize of output 1714 [2025-01-08 22:21:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:21:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285999444] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:10,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 17] total 78 [2025-01-08 22:21:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283869119] [2025-01-08 22:21:10,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:10,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-01-08 22:21:10,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:10,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-01-08 22:21:10,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=5596, Unknown=0, NotChecked=0, Total=6006 [2025-01-08 22:21:10,692 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 78 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 78 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 22:21:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:21:14,120 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2025-01-08 22:21:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-01-08 22:21:14,121 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 78 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 47 [2025-01-08 22:21:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:21:14,121 INFO L225 Difference]: With dead ends: 192 [2025-01-08 22:21:14,121 INFO L226 Difference]: Without dead ends: 154 [2025-01-08 22:21:14,122 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=979, Invalid=9323, Unknown=0, NotChecked=0, Total=10302 [2025-01-08 22:21:14,123 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 171 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 3868 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 3941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-01-08 22:21:14,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1413 Invalid, 3941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3868 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2025-01-08 22:21:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-01-08 22:21:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 88. [2025-01-08 22:21:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2025-01-08 22:21:14,186 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 47 [2025-01-08 22:21:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:21:14,187 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2025-01-08 22:21:14,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 78 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 22:21:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2025-01-08 22:21:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-08 22:21:14,187 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:21:14,187 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:21:14,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-01-08 22:21:14,388 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,SelfDestructingSolverStorable23 [2025-01-08 22:21:14,388 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:21:14,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:21:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1201137197, now seen corresponding path program 20 times [2025-01-08 22:21:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:21:14,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401180051] [2025-01-08 22:21:14,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:21:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:21:14,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-08 22:21:14,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:21:14,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:21:14,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 11 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-01-08 22:21:14,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:21:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401180051] [2025-01-08 22:21:14,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401180051] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:21:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525381909] [2025-01-08 22:21:14,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:21:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:21:14,612 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 22:21:14,614 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 22:21:14,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-08 22:21:14,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:21:14,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:21:14,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:14,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-08 22:21:14,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:21:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-01-08 22:21:14,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-01-08 22:21:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525381909] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:15,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:15,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2025-01-08 22:21:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177119834] [2025-01-08 22:21:15,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:15,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-01-08 22:21:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:15,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-01-08 22:21:15,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2025-01-08 22:21:15,202 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:21:15,453 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2025-01-08 22:21:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-08 22:21:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-01-08 22:21:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:21:15,454 INFO L225 Difference]: With dead ends: 160 [2025-01-08 22:21:15,454 INFO L226 Difference]: Without dead ends: 122 [2025-01-08 22:21:15,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=537, Invalid=1355, Unknown=0, NotChecked=0, Total=1892 [2025-01-08 22:21:15,454 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:21:15,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 70 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:21:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-01-08 22:21:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2025-01-08 22:21:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2025-01-08 22:21:15,518 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 49 [2025-01-08 22:21:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:21:15,518 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2025-01-08 22:21:15,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2025-01-08 22:21:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-08 22:21:15,519 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:21:15,519 INFO L218 NwaCegarLoop]: trace histogram [14, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:21:15,525 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 22:21:15,723 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,SelfDestructingSolverStorable24 [2025-01-08 22:21:15,723 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:21:15,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:21:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -310395240, now seen corresponding path program 21 times [2025-01-08 22:21:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:21:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958451011] [2025-01-08 22:21:15,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:21:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:21:15,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 8 equivalence classes. [2025-01-08 22:21:15,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 48 of 50 statements. [2025-01-08 22:21:15,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:21:15,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:21:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:21:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958451011] [2025-01-08 22:21:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958451011] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:21:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975954844] [2025-01-08 22:21:16,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:21:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:21:16,172 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 22:21:16,173 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 22:21:16,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 8 equivalence classes. [2025-01-08 22:21:16,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 48 of 50 statements. [2025-01-08 22:21:16,950 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:21:16,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:16,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-08 22:21:16,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:21:16,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-01-08 22:21:17,117 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2025-01-08 22:21:17,117 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 1 case distinctions, treesize of input 30 treesize of output 31 [2025-01-08 22:21:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:21:17,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:17,672 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 53 treesize of output 51 [2025-01-08 22:21:17,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 214 [2025-01-08 22:21:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-08 22:21:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975954844] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:17,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:17,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2025-01-08 22:21:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943990862] [2025-01-08 22:21:17,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:17,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-01-08 22:21:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:17,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-01-08 22:21:17,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2025-01-08 22:21:17,802 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:21:18,494 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2025-01-08 22:21:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-08 22:21:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-01-08 22:21:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:21:18,495 INFO L225 Difference]: With dead ends: 119 [2025-01-08 22:21:18,495 INFO L226 Difference]: Without dead ends: 117 [2025-01-08 22:21:18,495 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2025-01-08 22:21:18,495 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:21:18,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 588 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:21:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-01-08 22:21:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 68. [2025-01-08 22:21:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 22:21:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2025-01-08 22:21:18,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 50 [2025-01-08 22:21:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:21:18,549 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2025-01-08 22:21:18,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:21:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2025-01-08 22:21:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-08 22:21:18,549 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:21:18,549 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:21:18,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-01-08 22:21:18,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-01-08 22:21:18,750 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:21:18,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:21:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1935326184, now seen corresponding path program 22 times [2025-01-08 22:21:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:21:18,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89951201] [2025-01-08 22:21:18,751 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:21:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:21:18,764 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:21:18,771 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 37 of 50 statements. [2025-01-08 22:21:18,771 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:21:18,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:21:19,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:21:19,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89951201] [2025-01-08 22:21:19,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89951201] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:21:19,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11200004] [2025-01-08 22:21:19,441 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:21:19,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:19,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:21:19,443 INFO L229 MonitoredProcess]: Starting monitored process 25 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 22:21:19,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-08 22:21:19,560 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-01-08 22:21:19,585 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 37 of 50 statements. [2025-01-08 22:21:19,585 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:21:19,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:19,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-01-08 22:21:19,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:21:19,695 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-01-08 22:21:19,695 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 1 case distinctions, treesize of input 36 treesize of output 21 [2025-01-08 22:21:19,738 INFO L349 Elim1Store]: treesize reduction 50, result has 43.2 percent of original size [2025-01-08 22:21:19,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 50 [2025-01-08 22:21:19,797 INFO L349 Elim1Store]: treesize reduction 77, result has 39.4 percent of original size [2025-01-08 22:21:19,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 78 [2025-01-08 22:21:19,881 INFO L349 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2025-01-08 22:21:19,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 102 [2025-01-08 22:21:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:21:20,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:21,388 INFO L349 Elim1Store]: treesize reduction 56, result has 32.5 percent of original size [2025-01-08 22:21:21,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 122 [2025-01-08 22:21:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:21:21,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11200004] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:21,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:21,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 52 [2025-01-08 22:21:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129173285] [2025-01-08 22:21:21,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:21,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-01-08 22:21:21,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:21,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-01-08 22:21:21,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2025-01-08 22:21:21,518 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 22:21:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:21:25,499 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2025-01-08 22:21:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-01-08 22:21:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 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 22:21:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:21:25,500 INFO L225 Difference]: With dead ends: 198 [2025-01-08 22:21:25,500 INFO L226 Difference]: Without dead ends: 196 [2025-01-08 22:21:25,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1691, Invalid=10299, Unknown=0, NotChecked=0, Total=11990 [2025-01-08 22:21:25,501 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 192 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-08 22:21:25,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 251 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-08 22:21:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-01-08 22:21:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 124. [2025-01-08 22:21:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 22:21:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2025-01-08 22:21:25,631 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2025-01-08 22:21:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:21:25,631 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2025-01-08 22:21:25,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 22:21:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2025-01-08 22:21:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-08 22:21:25,632 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:21:25,632 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:21:25,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-01-08 22:21:25,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-01-08 22:21:25,837 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:21:25,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:21:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash 343433387, now seen corresponding path program 23 times [2025-01-08 22:21:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:21:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61076504] [2025-01-08 22:21:25,838 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:21:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:21:25,849 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 10 equivalence classes. [2025-01-08 22:21:25,866 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:21:25,867 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:21:25,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:21:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:21:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61076504] [2025-01-08 22:21:26,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61076504] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:21:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224019974] [2025-01-08 22:21:26,897 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:21:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:21:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:21:26,900 INFO L229 MonitoredProcess]: Starting monitored process 26 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 22:21:26,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-08 22:21:27,037 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 10 equivalence classes. [2025-01-08 22:21:27,398 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:21:27,399 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:21:27,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:21:27,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-01-08 22:21:27,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:21:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:27,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2025-01-08 22:21:27,798 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2025-01-08 22:21:27,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 50 [2025-01-08 22:21:27,878 INFO L349 Elim1Store]: treesize reduction 60, result has 47.4 percent of original size [2025-01-08 22:21:27,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 77 treesize of output 84 [2025-01-08 22:21:27,974 INFO L349 Elim1Store]: treesize reduction 80, result has 46.3 percent of original size [2025-01-08 22:21:27,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 106 treesize of output 120 [2025-01-08 22:21:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:28,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:21:28,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 139 [2025-01-08 22:21:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-08 22:21:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-08 22:21:29,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:21:29,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 158 treesize of output 98 [2025-01-08 22:21:29,298 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-08 22:21:29,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:21:29,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 46 treesize of output 20 [2025-01-08 22:21:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:21:29,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:21:30,104 INFO L349 Elim1Store]: treesize reduction 25, result has 51.0 percent of original size [2025-01-08 22:21:30,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 129 [2025-01-08 22:21:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:21:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224019974] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:21:30,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:21:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31, 31] total 78 [2025-01-08 22:21:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186748325] [2025-01-08 22:21:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:21:30,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-01-08 22:21:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:21:30,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-01-08 22:21:30,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5326, Unknown=0, NotChecked=0, Total=6006 [2025-01-08 22:21:30,910 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 78 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 78 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)