./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.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-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:33:29,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:33:29,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:33:30,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:33:30,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:33:30,033 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:33:30,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:33:30,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:33:30,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:33:30,035 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:33:30,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:33:30,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:33:30,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:33:30,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:33:30,037 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:33:30,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:33:30,037 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:33:30,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:33:30,039 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:33:30,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:33:30,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:33:30,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:33:30,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:33:30,040 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 -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2025-01-08 22:33:30,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:33:30,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:33:30,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:33:30,292 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:33:30,292 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:33:30,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2025-01-08 22:33:31,562 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44be41db9/27671e53a1234e93b1ba7ce7b734d69a/FLAGe3e473765 [2025-01-08 22:33:31,801 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:33:31,802 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2025-01-08 22:33:31,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44be41db9/27671e53a1234e93b1ba7ce7b734d69a/FLAGe3e473765 [2025-01-08 22:33:31,819 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44be41db9/27671e53a1234e93b1ba7ce7b734d69a [2025-01-08 22:33:31,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:33:31,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:33:31,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:33:31,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:33:31,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:33:31,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:33:31" (1/1) ... [2025-01-08 22:33:31,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ec8f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:31, skipping insertion in model container [2025-01-08 22:33:31,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:33:31" (1/1) ... [2025-01-08 22:33:31,839 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:33:31,972 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-patterns/array4_pattern.c[1835,1848] [2025-01-08 22:33:31,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:33:32,004 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:33:32,015 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-patterns/array4_pattern.c[1835,1848] [2025-01-08 22:33:32,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:33:32,041 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:33:32,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32 WrapperNode [2025-01-08 22:33:32,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:33:32,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:33:32,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:33:32,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:33:32,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,077 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2025-01-08 22:33:32,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:33:32,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:33:32,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:33:32,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:33:32,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,089 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,104 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-01-08 22:33:32,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,115 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,125 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:33:32,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:33:32,130 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:33:32,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:33:32,132 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (1/1) ... [2025-01-08 22:33:32,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:33:32,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:32,161 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 22:33:32,163 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 22:33:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:33:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-08 22:33:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:33:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:33:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-08 22:33:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-08 22:33:32,250 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:33:32,251 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:33:32,391 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-01-08 22:33:32,391 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:33:32,398 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:33:32,398 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-08 22:33:32,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:33:32 BoogieIcfgContainer [2025-01-08 22:33:32,398 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:33:32,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:33:32,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:33:32,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:33:32,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:33:31" (1/3) ... [2025-01-08 22:33:32,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33aa7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:33:32, skipping insertion in model container [2025-01-08 22:33:32,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:33:32" (2/3) ... [2025-01-08 22:33:32,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33aa7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:33:32, skipping insertion in model container [2025-01-08 22:33:32,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:33:32" (3/3) ... [2025-01-08 22:33:32,407 INFO L128 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2025-01-08 22:33:32,420 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:33:32,421 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array4_pattern.c that has 2 procedures, 29 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-08 22:33:32,475 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:33:32,485 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;@44a9de93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:33:32,487 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:33:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:33:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-08 22:33:32,498 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:32,498 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:32,499 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:32,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -54455535, now seen corresponding path program 1 times [2025-01-08 22:33:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:32,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649426980] [2025-01-08 22:33:32,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:32,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:32,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-08 22:33:32,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-08 22:33:32,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:32,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:32,642 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 22:33:32,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649426980] [2025-01-08 22:33:32,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649426980] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:33:32,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:33:32,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-08 22:33:32,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189815212] [2025-01-08 22:33:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:33:32,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-08 22:33:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:32,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-08 22:33:32,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-08 22:33:32,669 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-08 22:33:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:32,687 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2025-01-08 22:33:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-08 22:33:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-01-08 22:33:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:32,694 INFO L225 Difference]: With dead ends: 55 [2025-01-08 22:33:32,694 INFO L226 Difference]: Without dead ends: 25 [2025-01-08 22:33:32,697 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 22:33:32,701 INFO L435 NwaCegarLoop]: 36 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, 36 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 22:33:32,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:33:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-01-08 22:33:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-01-08 22:33:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:33:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2025-01-08 22:33:32,740 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2025-01-08 22:33:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:32,741 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2025-01-08 22:33:32,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-08 22:33:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2025-01-08 22:33:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-08 22:33:32,744 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:32,744 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:32,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:33:32,745 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:32,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1406664338, now seen corresponding path program 1 times [2025-01-08 22:33:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:32,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396720535] [2025-01-08 22:33:32,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:32,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-08 22:33:32,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:33:32,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:32,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:32,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396720535] [2025-01-08 22:33:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396720535] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:33:32,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:33:32,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:33:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229945180] [2025-01-08 22:33:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:33:32,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:33:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:32,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:33:32,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:33:32,976 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:33,025 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2025-01-08 22:33:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:33:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-01-08 22:33:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:33,027 INFO L225 Difference]: With dead ends: 55 [2025-01-08 22:33:33,027 INFO L226 Difference]: Without dead ends: 35 [2025-01-08 22:33:33,028 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 22:33:33,028 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:33,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:33:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-01-08 22:33:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2025-01-08 22:33:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-08 22:33:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-01-08 22:33:33,041 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 40 [2025-01-08 22:33:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:33,042 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-01-08 22:33:33,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-01-08 22:33:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-08 22:33:33,043 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:33,043 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:33,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:33:33,043 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:33,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash 368343024, now seen corresponding path program 1 times [2025-01-08 22:33:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090450267] [2025-01-08 22:33:33,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:33,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-08 22:33:33,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-08 22:33:33,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:33,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090450267] [2025-01-08 22:33:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090450267] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:33:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:33:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:33:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732950028] [2025-01-08 22:33:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:33:33,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:33:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:33,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:33:33,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:33:33,271 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:33,294 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2025-01-08 22:33:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:33:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2025-01-08 22:33:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:33,296 INFO L225 Difference]: With dead ends: 38 [2025-01-08 22:33:33,296 INFO L226 Difference]: Without dead ends: 35 [2025-01-08 22:33:33,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:33:33,297 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:33,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:33:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-01-08 22:33:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-01-08 22:33:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-08 22:33:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2025-01-08 22:33:33,309 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 40 [2025-01-08 22:33:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:33,309 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2025-01-08 22:33:33,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,310 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2025-01-08 22:33:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-08 22:33:33,310 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:33,312 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:33,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-08 22:33:33,313 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:33,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1466330615, now seen corresponding path program 1 times [2025-01-08 22:33:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:33,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256764304] [2025-01-08 22:33:33,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:33,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-08 22:33:33,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-08 22:33:33,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:33,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256764304] [2025-01-08 22:33:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256764304] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:33:33,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:33:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-08 22:33:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430192571] [2025-01-08 22:33:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:33:33,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-08 22:33:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:33,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-08 22:33:33,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-08 22:33:33,492 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:33,560 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2025-01-08 22:33:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-08 22:33:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2025-01-08 22:33:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:33,562 INFO L225 Difference]: With dead ends: 68 [2025-01-08 22:33:33,563 INFO L226 Difference]: Without dead ends: 37 [2025-01-08 22:33:33,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-08 22:33:33,564 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:33,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:33:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-01-08 22:33:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-01-08 22:33:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-01-08 22:33:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-01-08 22:33:33,576 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 41 [2025-01-08 22:33:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:33,576 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-01-08 22:33:33,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-08 22:33:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-01-08 22:33:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-08 22:33:33,577 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:33,578 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:33,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-08 22:33:33,579 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:33,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1537927979, now seen corresponding path program 1 times [2025-01-08 22:33:33,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:33,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391980567] [2025-01-08 22:33:33,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:33,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-08 22:33:33,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:33:33,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:33,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:33:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894632745] [2025-01-08 22:33:33,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:33:33,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:33,651 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 22:33:33,654 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 22:33:33,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-08 22:33:33,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-08 22:33:33,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:33,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:33,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-01-08 22:33:33,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:33,853 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 22:33:34,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2025-01-08 22:33:34,773 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2025-01-08 22:33:34,774 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 5 case distinctions, treesize of input 33 treesize of output 55 [2025-01-08 22:33:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-08 22:33:35,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:35,146 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 34 treesize of output 32 [2025-01-08 22:33:35,153 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 56 treesize of output 54 [2025-01-08 22:33:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391980567] [2025-01-08 22:33:35,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:33:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894632745] [2025-01-08 22:33:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894632745] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:35,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:33:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-01-08 22:33:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534957710] [2025-01-08 22:33:35,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:35,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-08 22:33:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:35,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-08 22:33:35,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:33:35,591 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:35,905 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2025-01-08 22:33:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-08 22:33:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2025-01-08 22:33:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:35,907 INFO L225 Difference]: With dead ends: 74 [2025-01-08 22:33:35,907 INFO L226 Difference]: Without dead ends: 71 [2025-01-08 22:33:35,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2025-01-08 22:33:35,908 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:35,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:33:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-08 22:33:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2025-01-08 22:33:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-08 22:33:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2025-01-08 22:33:35,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 42 [2025-01-08 22:33:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:35,929 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2025-01-08 22:33:35,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2025-01-08 22:33:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-01-08 22:33:35,932 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:35,932 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:35,941 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 22:33:36,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:36,133 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:36,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash 537521033, now seen corresponding path program 2 times [2025-01-08 22:33:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45425402] [2025-01-08 22:33:36,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:33:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:36,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-08 22:33:36,162 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-08 22:33:36,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:33:36,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:36,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:36,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45425402] [2025-01-08 22:33:36,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45425402] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:36,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592610064] [2025-01-08 22:33:36,300 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:33:36,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:36,302 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 22:33:36,305 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 22:33:36,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-08 22:33:36,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-08 22:33:36,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:33:36,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:36,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:33:36,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:36,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592610064] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-01-08 22:33:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194793543] [2025-01-08 22:33:36,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:36,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-08 22:33:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:36,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-08 22:33:36,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:33:36,531 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:36,703 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2025-01-08 22:33:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-08 22:33:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2025-01-08 22:33:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:36,707 INFO L225 Difference]: With dead ends: 120 [2025-01-08 22:33:36,707 INFO L226 Difference]: Without dead ends: 99 [2025-01-08 22:33:36,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:33:36,708 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:36,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 147 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:33:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-01-08 22:33:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2025-01-08 22:33:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2025-01-08 22:33:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2025-01-08 22:33:36,733 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 43 [2025-01-08 22:33:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:36,734 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2025-01-08 22:33:36,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2025-01-08 22:33:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-01-08 22:33:36,735 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:36,736 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:36,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-08 22:33:36,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:36,937 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:36,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash -431189564, now seen corresponding path program 3 times [2025-01-08 22:33:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:36,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482463650] [2025-01-08 22:33:36,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:33:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:36,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 6 equivalence classes. [2025-01-08 22:33:36,977 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 43 of 43 statements. [2025-01-08 22:33:36,977 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:33:36,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:37,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482463650] [2025-01-08 22:33:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482463650] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099100963] [2025-01-08 22:33:37,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:33:37,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:37,093 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 22:33:37,095 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 22:33:37,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 6 equivalence classes. [2025-01-08 22:33:37,167 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 43 of 43 statements. [2025-01-08 22:33:37,167 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:33:37,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:37,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:33:37,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:37,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099100963] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:37,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:37,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-01-08 22:33:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035675145] [2025-01-08 22:33:37,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:37,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-08 22:33:37,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:37,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-08 22:33:37,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-01-08 22:33:37,316 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:37,468 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2025-01-08 22:33:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-08 22:33:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2025-01-08 22:33:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:37,471 INFO L225 Difference]: With dead ends: 134 [2025-01-08 22:33:37,471 INFO L226 Difference]: Without dead ends: 110 [2025-01-08 22:33:37,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:33:37,472 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:37,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 117 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:33:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-01-08 22:33:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2025-01-08 22:33:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 72 states have internal predecessors, (80), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2025-01-08 22:33:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2025-01-08 22:33:37,490 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 43 [2025-01-08 22:33:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:37,491 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2025-01-08 22:33:37,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2025-01-08 22:33:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-08 22:33:37,492 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:37,492 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:37,500 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 22:33:37,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:37,696 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:37,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -516779632, now seen corresponding path program 4 times [2025-01-08 22:33:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152915142] [2025-01-08 22:33:37,697 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:33:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:37,705 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-01-08 22:33:37,762 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:33:37,762 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:33:37,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:33:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696465780] [2025-01-08 22:33:37,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:33:37,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:37,769 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 22:33:37,771 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 22:33:37,812 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-01-08 22:33:37,842 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-08 22:33:37,842 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:33:37,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:37,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-01-08 22:33:37,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:37,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:37,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:37,918 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:37,930 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:38,921 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2025-01-08 22:33:38,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2025-01-08 22:33:38,991 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2025-01-08 22:33:38,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2025-01-08 22:33:39,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:39,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2025-01-08 22:33:39,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:39,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2025-01-08 22:33:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:33:39,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:39,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152915142] [2025-01-08 22:33:39,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:33:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696465780] [2025-01-08 22:33:39,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696465780] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:39,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:33:39,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-01-08 22:33:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568479254] [2025-01-08 22:33:39,732 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:39,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-08 22:33:39,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:39,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-08 22:33:39,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-01-08 22:33:39,734 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:40,182 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2025-01-08 22:33:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-08 22:33:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2025-01-08 22:33:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:40,185 INFO L225 Difference]: With dead ends: 134 [2025-01-08 22:33:40,185 INFO L226 Difference]: Without dead ends: 131 [2025-01-08 22:33:40,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:33:40,187 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:40,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 212 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:33:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-01-08 22:33:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2025-01-08 22:33:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2025-01-08 22:33:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2025-01-08 22:33:40,204 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 44 [2025-01-08 22:33:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:40,205 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2025-01-08 22:33:40,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2025-01-08 22:33:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-08 22:33:40,206 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:40,206 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:40,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-08 22:33:40,407 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,SelfDestructingSolverStorable7 [2025-01-08 22:33:40,407 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:40,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1124895556, now seen corresponding path program 5 times [2025-01-08 22:33:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974093403] [2025-01-08 22:33:40,408 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:33:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:40,415 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 7 equivalence classes. [2025-01-08 22:33:40,451 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:33:40,451 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-08 22:33:40,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974093403] [2025-01-08 22:33:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974093403] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:40,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415536101] [2025-01-08 22:33:40,548 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:33:40,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:40,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:40,550 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 22:33:40,558 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 22:33:40,600 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 45 statements into 7 equivalence classes. [2025-01-08 22:33:40,634 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 45 of 45 statements. [2025-01-08 22:33:40,634 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-01-08 22:33:40,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:40,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:33:40,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:40,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415536101] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:40,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:40,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-01-08 22:33:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310234684] [2025-01-08 22:33:40,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:40,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-08 22:33:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:40,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-08 22:33:40,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:33:40,768 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:41,008 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2025-01-08 22:33:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-08 22:33:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 45 [2025-01-08 22:33:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:41,010 INFO L225 Difference]: With dead ends: 208 [2025-01-08 22:33:41,010 INFO L226 Difference]: Without dead ends: 175 [2025-01-08 22:33:41,010 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-01-08 22:33:41,011 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 41 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:41,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 234 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:33:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2025-01-08 22:33:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2025-01-08 22:33:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 109 states have internal predecessors, (123), 41 states have call successors, (41), 8 states have call predecessors, (41), 8 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2025-01-08 22:33:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2025-01-08 22:33:41,037 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 45 [2025-01-08 22:33:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:41,037 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2025-01-08 22:33:41,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2025-01-08 22:33:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-08 22:33:41,038 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:41,038 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:41,045 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 22:33:41,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:41,239 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:41,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1159638121, now seen corresponding path program 6 times [2025-01-08 22:33:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594532669] [2025-01-08 22:33:41,239 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:33:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:41,246 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 6 equivalence classes. [2025-01-08 22:33:41,268 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 40 of 45 statements. [2025-01-08 22:33:41,268 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:33:41,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:41,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594532669] [2025-01-08 22:33:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594532669] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718340238] [2025-01-08 22:33:41,360 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:33:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:41,363 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 22:33:41,364 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 22:33:41,410 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 45 statements into 6 equivalence classes. [2025-01-08 22:33:41,451 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 40 of 45 statements. [2025-01-08 22:33:41,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-01-08 22:33:41,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:41,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-08 22:33:41,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:41,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:41,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718340238] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:41,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:41,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-01-08 22:33:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970930830] [2025-01-08 22:33:41,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:41,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-08 22:33:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:41,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-08 22:33:41,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:33:41,588 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:41,789 INFO L93 Difference]: Finished difference Result 261 states and 340 transitions. [2025-01-08 22:33:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-08 22:33:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 45 [2025-01-08 22:33:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:41,791 INFO L225 Difference]: With dead ends: 261 [2025-01-08 22:33:41,792 INFO L226 Difference]: Without dead ends: 195 [2025-01-08 22:33:41,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2025-01-08 22:33:41,795 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:41,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 116 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:33:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2025-01-08 22:33:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 181. [2025-01-08 22:33:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 124 states have internal predecessors, (139), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2025-01-08 22:33:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2025-01-08 22:33:41,823 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 45 [2025-01-08 22:33:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:41,824 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2025-01-08 22:33:41,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2025-01-08 22:33:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-08 22:33:41,825 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:41,825 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:41,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-08 22:33:42,029 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,SelfDestructingSolverStorable9 [2025-01-08 22:33:42,029 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:42,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 511961397, now seen corresponding path program 7 times [2025-01-08 22:33:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:42,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089638667] [2025-01-08 22:33:42,030 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:33:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:42,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-08 22:33:42,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:33:42,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:42,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:33:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466397278] [2025-01-08 22:33:42,073 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:33:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:42,076 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 22:33:42,078 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 22:33:42,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-08 22:33:42,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-08 22:33:42,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:42,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:42,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-01-08 22:33:42,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:42,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:42,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:42,272 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:42,282 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:42,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:42,342 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:42,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:42,356 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:43,489 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2025-01-08 22:33:43,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2025-01-08 22:33:43,577 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2025-01-08 22:33:43,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2025-01-08 22:33:44,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:44,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 52 [2025-01-08 22:33:44,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:44,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 76 [2025-01-08 22:33:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:33:44,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089638667] [2025-01-08 22:33:44,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:33:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466397278] [2025-01-08 22:33:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466397278] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:44,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:33:44,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-01-08 22:33:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660171879] [2025-01-08 22:33:44,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:44,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-08 22:33:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:44,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-08 22:33:44,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:33:44,610 INFO L87 Difference]: Start difference. First operand 181 states and 237 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:45,649 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2025-01-08 22:33:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-08 22:33:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2025-01-08 22:33:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:45,654 INFO L225 Difference]: With dead ends: 215 [2025-01-08 22:33:45,654 INFO L226 Difference]: Without dead ends: 212 [2025-01-08 22:33:45,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2025-01-08 22:33:45,655 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:45,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 251 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:33:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-01-08 22:33:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2025-01-08 22:33:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 137 states have internal predecessors, (154), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2025-01-08 22:33:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2025-01-08 22:33:45,685 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 46 [2025-01-08 22:33:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:45,685 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2025-01-08 22:33:45,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 19 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2025-01-08 22:33:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-08 22:33:45,687 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:45,687 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:45,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-08 22:33:45,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:45,887 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:45,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1908819433, now seen corresponding path program 8 times [2025-01-08 22:33:45,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:45,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699649585] [2025-01-08 22:33:45,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:33:45,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:45,896 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-01-08 22:33:45,903 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:33:45,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:33:45,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:46,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699649585] [2025-01-08 22:33:46,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699649585] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872514081] [2025-01-08 22:33:46,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:33:46,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:46,042 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 22:33:46,044 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 22:33:46,107 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-01-08 22:33:46,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:33:46,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:33:46,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:46,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-08 22:33:46,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:46,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872514081] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:46,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:46,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-01-08 22:33:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785377550] [2025-01-08 22:33:46,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:46,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:33:46,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:46,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:33:46,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:33:46,344 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:46,728 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2025-01-08 22:33:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-08 22:33:46,729 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2025-01-08 22:33:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:46,730 INFO L225 Difference]: With dead ends: 319 [2025-01-08 22:33:46,730 INFO L226 Difference]: Without dead ends: 274 [2025-01-08 22:33:46,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2025-01-08 22:33:46,731 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 74 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:46,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 436 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:33:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-01-08 22:33:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 247. [2025-01-08 22:33:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 168 states have internal predecessors, (190), 69 states have call successors, (69), 10 states have call predecessors, (69), 10 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2025-01-08 22:33:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 328 transitions. [2025-01-08 22:33:46,764 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 328 transitions. Word has length 47 [2025-01-08 22:33:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:46,764 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 328 transitions. [2025-01-08 22:33:46,764 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 328 transitions. [2025-01-08 22:33:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-08 22:33:46,765 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:46,765 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:46,773 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 22:33:46,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:46,966 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:46,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1309128348, now seen corresponding path program 9 times [2025-01-08 22:33:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690709864] [2025-01-08 22:33:46,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:33:46,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:46,972 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 7 equivalence classes. [2025-01-08 22:33:47,010 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:33:47,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:33:47,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690709864] [2025-01-08 22:33:47,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690709864] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:47,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033349742] [2025-01-08 22:33:47,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:33:47,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:47,148 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 22:33:47,149 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 22:33:47,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 7 equivalence classes. [2025-01-08 22:33:47,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-01-08 22:33:47,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-08 22:33:47,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:47,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-08 22:33:47,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:47,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033349742] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:47,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-01-08 22:33:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261045000] [2025-01-08 22:33:47,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:47,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-08 22:33:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:47,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-08 22:33:47,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-01-08 22:33:47,379 INFO L87 Difference]: Start difference. First operand 247 states and 328 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:47,660 INFO L93 Difference]: Finished difference Result 454 states and 606 transitions. [2025-01-08 22:33:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-08 22:33:47,660 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2025-01-08 22:33:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:47,662 INFO L225 Difference]: With dead ends: 454 [2025-01-08 22:33:47,662 INFO L226 Difference]: Without dead ends: 325 [2025-01-08 22:33:47,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:33:47,663 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 219 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:47,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 245 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:33:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2025-01-08 22:33:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 281. [2025-01-08 22:33:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 190 states have internal predecessors, (214), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2025-01-08 22:33:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 376 transitions. [2025-01-08 22:33:47,702 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 376 transitions. Word has length 47 [2025-01-08 22:33:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:47,702 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 376 transitions. [2025-01-08 22:33:47,702 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 376 transitions. [2025-01-08 22:33:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-01-08 22:33:47,703 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:47,703 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:47,711 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 22:33:47,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:47,904 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:47,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash -956202192, now seen corresponding path program 10 times [2025-01-08 22:33:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736517641] [2025-01-08 22:33:47,905 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:33:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:47,912 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-01-08 22:33:47,954 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-01-08 22:33:47,956 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:33:47,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:33:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110941395] [2025-01-08 22:33:47,957 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:33:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:47,960 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 22:33:47,962 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 22:33:48,017 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-01-08 22:33:48,101 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-01-08 22:33:48,101 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:33:48,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:48,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-01-08 22:33:48,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:48,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:48,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:48,153 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:48,160 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:48,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:48,200 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:48,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:48,212 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:48,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:48,251 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:33:48,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:48,263 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:33:49,573 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2025-01-08 22:33:49,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2025-01-08 22:33:49,697 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2025-01-08 22:33:49,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2025-01-08 22:33:50,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:50,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 84 [2025-01-08 22:33:50,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:50,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 127 [2025-01-08 22:33:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:33:50,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:51,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736517641] [2025-01-08 22:33:51,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:33:51,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110941395] [2025-01-08 22:33:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110941395] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:51,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:33:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-01-08 22:33:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255260315] [2025-01-08 22:33:51,132 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:51,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-08 22:33:51,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:51,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-08 22:33:51,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2025-01-08 22:33:51,133 INFO L87 Difference]: Start difference. First operand 281 states and 376 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:51,825 INFO L93 Difference]: Finished difference Result 317 states and 421 transitions. [2025-01-08 22:33:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-08 22:33:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2025-01-08 22:33:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:51,828 INFO L225 Difference]: With dead ends: 317 [2025-01-08 22:33:51,828 INFO L226 Difference]: Without dead ends: 314 [2025-01-08 22:33:51,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:33:51,828 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:51,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 295 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:33:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2025-01-08 22:33:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 299. [2025-01-08 22:33:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 202 states have (on average 1.1336633663366336) internal successors, (229), 203 states have internal predecessors, (229), 85 states have call successors, (85), 11 states have call predecessors, (85), 11 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2025-01-08 22:33:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 399 transitions. [2025-01-08 22:33:51,867 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 399 transitions. Word has length 48 [2025-01-08 22:33:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:51,867 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 399 transitions. [2025-01-08 22:33:51,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-08 22:33:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 399 transitions. [2025-01-08 22:33:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-08 22:33:51,869 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:51,869 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:51,877 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 22:33:52,069 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,SelfDestructingSolverStorable13 [2025-01-08 22:33:52,069 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:52,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:52,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1394574052, now seen corresponding path program 11 times [2025-01-08 22:33:52,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:52,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536744353] [2025-01-08 22:33:52,070 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:33:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:52,077 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 8 equivalence classes. [2025-01-08 22:33:52,101 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:33:52,101 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:33:52,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:52,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:52,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536744353] [2025-01-08 22:33:52,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536744353] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:52,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256785787] [2025-01-08 22:33:52,265 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:33:52,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:52,267 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 22:33:52,270 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 22:33:52,326 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 8 equivalence classes. [2025-01-08 22:33:52,409 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:33:52,409 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-01-08 22:33:52,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:52,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:33:52,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:52,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:52,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256785787] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:52,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:52,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-01-08 22:33:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648546545] [2025-01-08 22:33:52,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:52,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-08 22:33:52,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:52,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-08 22:33:52,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-01-08 22:33:52,565 INFO L87 Difference]: Start difference. First operand 299 states and 399 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:52,885 INFO L93 Difference]: Finished difference Result 455 states and 602 transitions. [2025-01-08 22:33:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-08 22:33:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 49 [2025-01-08 22:33:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:52,888 INFO L225 Difference]: With dead ends: 455 [2025-01-08 22:33:52,888 INFO L226 Difference]: Without dead ends: 398 [2025-01-08 22:33:52,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:33:52,890 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 121 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:52,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 342 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:33:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2025-01-08 22:33:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 358. [2025-01-08 22:33:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 240 states have (on average 1.1375) internal successors, (273), 241 states have internal predecessors, (273), 105 states have call successors, (105), 12 states have call predecessors, (105), 12 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2025-01-08 22:33:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 483 transitions. [2025-01-08 22:33:52,951 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 483 transitions. Word has length 49 [2025-01-08 22:33:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:52,951 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 483 transitions. [2025-01-08 22:33:52,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 483 transitions. [2025-01-08 22:33:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-08 22:33:52,953 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:52,953 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:52,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-08 22:33:53,153 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,SelfDestructingSolverStorable14 [2025-01-08 22:33:53,154 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:53,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash 422440649, now seen corresponding path program 12 times [2025-01-08 22:33:53,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:53,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55665] [2025-01-08 22:33:53,155 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:33:53,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:53,161 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 7 equivalence classes. [2025-01-08 22:33:53,194 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:33:53,194 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-08 22:33:53,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55665] [2025-01-08 22:33:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55665] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404158429] [2025-01-08 22:33:53,339 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:33:53,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:53,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:53,341 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 22:33:53,344 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 22:33:53,404 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 7 equivalence classes. [2025-01-08 22:33:53,572 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 49 of 49 statements. [2025-01-08 22:33:53,573 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-08 22:33:53,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:53,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:33:53,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:33:53,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:33:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404158429] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:33:53,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:33:53,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-01-08 22:33:53,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697614787] [2025-01-08 22:33:53,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:53,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-08 22:33:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:53,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-08 22:33:53,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2025-01-08 22:33:53,732 INFO L87 Difference]: Start difference. First operand 358 states and 483 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:33:54,199 INFO L93 Difference]: Finished difference Result 729 states and 985 transitions. [2025-01-08 22:33:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-08 22:33:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 49 [2025-01-08 22:33:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:33:54,204 INFO L225 Difference]: With dead ends: 729 [2025-01-08 22:33:54,204 INFO L226 Difference]: Without dead ends: 515 [2025-01-08 22:33:54,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:33:54,207 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 491 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-08 22:33:54,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 284 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-08 22:33:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2025-01-08 22:33:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 403. [2025-01-08 22:33:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 269 states have (on average 1.1338289962825279) internal successors, (305), 270 states have internal predecessors, (305), 121 states have call successors, (121), 12 states have call predecessors, (121), 12 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2025-01-08 22:33:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 547 transitions. [2025-01-08 22:33:54,272 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 547 transitions. Word has length 49 [2025-01-08 22:33:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:33:54,272 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 547 transitions. [2025-01-08 22:33:54,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:33:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 547 transitions. [2025-01-08 22:33:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-08 22:33:54,273 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:33:54,274 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:33:54,282 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 22:33:54,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:54,474 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:33:54,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:33:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 282060181, now seen corresponding path program 13 times [2025-01-08 22:33:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:33:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656742309] [2025-01-08 22:33:54,475 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:33:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:33:54,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-08 22:33:54,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:33:54,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:54,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:33:54,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241272801] [2025-01-08 22:33:54,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:33:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:33:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:33:54,513 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 22:33:54,515 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 22:33:54,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-08 22:33:54,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-08 22:33:54,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:33:54,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:33:54,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 102 conjuncts are in the unsatisfiable core [2025-01-08 22:33:54,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:33:54,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:54,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:33:54,771 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:54,783 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:33:54,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,834 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:54,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,843 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:33:54,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,900 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:33:54,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,913 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:33:54,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:33:54,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:54,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:33:56,716 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2025-01-08 22:33:56,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2025-01-08 22:33:56,890 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2025-01-08 22:33:56,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2025-01-08 22:33:58,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:58,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 113 [2025-01-08 22:33:58,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:33:58,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 182 [2025-01-08 22:33:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-08 22:33:58,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:33:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:33:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656742309] [2025-01-08 22:33:59,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:33:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241272801] [2025-01-08 22:33:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241272801] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:33:59,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:33:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2025-01-08 22:33:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080931115] [2025-01-08 22:33:59,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:33:59,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:33:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:33:59,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:33:59,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2025-01-08 22:33:59,739 INFO L87 Difference]: Start difference. First operand 403 states and 547 transitions. Second operand has 29 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:02,038 INFO L93 Difference]: Finished difference Result 443 states and 596 transitions. [2025-01-08 22:34:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-08 22:34:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2025-01-08 22:34:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:02,041 INFO L225 Difference]: With dead ends: 443 [2025-01-08 22:34:02,041 INFO L226 Difference]: Without dead ends: 440 [2025-01-08 22:34:02,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2025-01-08 22:34:02,043 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:02,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 321 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-08 22:34:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2025-01-08 22:34:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 421. [2025-01-08 22:34:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 282 states have (on average 1.1347517730496455) internal successors, (320), 283 states have internal predecessors, (320), 125 states have call successors, (125), 13 states have call predecessors, (125), 13 states have return successors, (125), 124 states have call predecessors, (125), 125 states have call successors, (125) [2025-01-08 22:34:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 570 transitions. [2025-01-08 22:34:02,119 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 570 transitions. Word has length 50 [2025-01-08 22:34:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:02,120 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 570 transitions. [2025-01-08 22:34:02,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 570 transitions. [2025-01-08 22:34:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:34:02,121 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:02,121 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:02,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-08 22:34:02,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-08 22:34:02,322 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:02,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 225232969, now seen corresponding path program 14 times [2025-01-08 22:34:02,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:02,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875695158] [2025-01-08 22:34:02,322 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:02,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:34:02,342 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:34:02,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:02,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:02,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875695158] [2025-01-08 22:34:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875695158] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145543873] [2025-01-08 22:34:02,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:02,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:02,540 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 22:34:02,541 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 22:34:02,602 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:34:02,627 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:34:02,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:02,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:02,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:34:02,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:02,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:02,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145543873] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:02,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:02,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:34:02,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63455274] [2025-01-08 22:34:02,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:02,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:34:02,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:02,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:34:02,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:34:02,893 INFO L87 Difference]: Start difference. First operand 421 states and 570 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:03,431 INFO L93 Difference]: Finished difference Result 616 states and 822 transitions. [2025-01-08 22:34:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-08 22:34:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2025-01-08 22:34:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:03,435 INFO L225 Difference]: With dead ends: 616 [2025-01-08 22:34:03,435 INFO L226 Difference]: Without dead ends: 547 [2025-01-08 22:34:03,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:34:03,436 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 145 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:03,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 496 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-08 22:34:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2025-01-08 22:34:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 491. [2025-01-08 22:34:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 327 states have (on average 1.1376146788990826) internal successors, (372), 328 states have internal predecessors, (372), 149 states have call successors, (149), 14 states have call predecessors, (149), 14 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2025-01-08 22:34:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 670 transitions. [2025-01-08 22:34:03,525 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 670 transitions. Word has length 51 [2025-01-08 22:34:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:03,526 INFO L471 AbstractCegarLoop]: Abstraction has 491 states and 670 transitions. [2025-01-08 22:34:03,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 670 transitions. [2025-01-08 22:34:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:34:03,528 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:03,528 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:03,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-08 22:34:03,728 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,SelfDestructingSolverStorable17 [2025-01-08 22:34:03,729 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:03,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 153868548, now seen corresponding path program 15 times [2025-01-08 22:34:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342376331] [2025-01-08 22:34:03,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:03,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:03,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 8 equivalence classes. [2025-01-08 22:34:03,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:34:03,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-01-08 22:34:03,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342376331] [2025-01-08 22:34:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342376331] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816828537] [2025-01-08 22:34:03,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:03,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:03,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:03,958 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 22:34:03,961 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 22:34:04,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 8 equivalence classes. [2025-01-08 22:34:04,089 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:34:04,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-01-08 22:34:04,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:04,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-08 22:34:04,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:04,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816828537] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:04,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-01-08 22:34:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092964129] [2025-01-08 22:34:04,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:04,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-08 22:34:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:04,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-08 22:34:04,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-08 22:34:04,354 INFO L87 Difference]: Start difference. First operand 491 states and 670 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:05,100 INFO L93 Difference]: Finished difference Result 1080 states and 1470 transitions. [2025-01-08 22:34:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-08 22:34:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2025-01-08 22:34:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:05,105 INFO L225 Difference]: With dead ends: 1080 [2025-01-08 22:34:05,105 INFO L226 Difference]: Without dead ends: 759 [2025-01-08 22:34:05,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2025-01-08 22:34:05,107 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 564 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:05,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 393 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-08 22:34:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2025-01-08 22:34:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 547. [2025-01-08 22:34:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 363 states have (on average 1.1349862258953167) internal successors, (412), 364 states have internal predecessors, (412), 169 states have call successors, (169), 14 states have call predecessors, (169), 14 states have return successors, (169), 168 states have call predecessors, (169), 169 states have call successors, (169) [2025-01-08 22:34:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 750 transitions. [2025-01-08 22:34:05,218 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 750 transitions. Word has length 51 [2025-01-08 22:34:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:05,219 INFO L471 AbstractCegarLoop]: Abstraction has 547 states and 750 transitions. [2025-01-08 22:34:05,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 750 transitions. [2025-01-08 22:34:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-08 22:34:05,221 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:05,221 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:05,231 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 22:34:05,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:05,422 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:05,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1607775024, now seen corresponding path program 16 times [2025-01-08 22:34:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:05,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841771857] [2025-01-08 22:34:05,422 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:34:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:05,429 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-01-08 22:34:05,452 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-08 22:34:05,453 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:34:05,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:34:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275759242] [2025-01-08 22:34:05,454 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:34:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:05,457 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 22:34:05,458 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 22:34:05,526 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 52 statements into 2 equivalence classes. [2025-01-08 22:34:05,727 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-08 22:34:05,727 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:34:05,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:05,730 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 116 conjuncts are in the unsatisfiable core [2025-01-08 22:34:05,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:05,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:05,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:05,775 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:05,782 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:05,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,818 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:05,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,834 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:05,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,885 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:05,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,900 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:05,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:05,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:05,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:06,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:06,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:06,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:06,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:08,930 INFO L349 Elim1Store]: treesize reduction 492, result has 28.8 percent of original size [2025-01-08 22:34:08,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 264 [2025-01-08 22:34:09,290 INFO L349 Elim1Store]: treesize reduction 456, result has 30.4 percent of original size [2025-01-08 22:34:09,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 262 [2025-01-08 22:34:13,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:13,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2025-01-08 22:34:13,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:13,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 459 treesize of output 235 [2025-01-08 22:34:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-08 22:34:13,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:15,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841771857] [2025-01-08 22:34:15,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:34:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275759242] [2025-01-08 22:34:15,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275759242] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:15,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:34:15,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2025-01-08 22:34:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692319408] [2025-01-08 22:34:15,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:15,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:34:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:15,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:34:15,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2025-01-08 22:34:15,179 INFO L87 Difference]: Start difference. First operand 547 states and 750 transitions. Second operand has 29 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:16,544 INFO L93 Difference]: Finished difference Result 592 states and 803 transitions. [2025-01-08 22:34:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-01-08 22:34:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2025-01-08 22:34:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:16,548 INFO L225 Difference]: With dead ends: 592 [2025-01-08 22:34:16,548 INFO L226 Difference]: Without dead ends: 589 [2025-01-08 22:34:16,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2025-01-08 22:34:16,549 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 31 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:16,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 339 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-01-08 22:34:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2025-01-08 22:34:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 569. [2025-01-08 22:34:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 379 states have (on average 1.1345646437994723) internal successors, (430), 380 states have internal predecessors, (430), 173 states have call successors, (173), 16 states have call predecessors, (173), 16 states have return successors, (173), 172 states have call predecessors, (173), 173 states have call successors, (173) [2025-01-08 22:34:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 776 transitions. [2025-01-08 22:34:16,667 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 776 transitions. Word has length 52 [2025-01-08 22:34:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:16,667 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 776 transitions. [2025-01-08 22:34:16,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 776 transitions. [2025-01-08 22:34:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-08 22:34:16,669 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:16,669 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:16,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-08 22:34:16,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:16,870 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:16,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash -384150908, now seen corresponding path program 17 times [2025-01-08 22:34:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163193497] [2025-01-08 22:34:16,870 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:34:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:16,878 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 9 equivalence classes. [2025-01-08 22:34:16,905 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:34:16,905 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-08 22:34:16,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163193497] [2025-01-08 22:34:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163193497] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576556926] [2025-01-08 22:34:17,112 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:34:17,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:17,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:17,114 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 22:34:17,117 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 22:34:17,191 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 9 equivalence classes. [2025-01-08 22:34:17,406 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:34:17,407 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-08 22:34:17,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:17,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:34:17,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:17,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576556926] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:17,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:17,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-01-08 22:34:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939156750] [2025-01-08 22:34:17,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:17,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-08 22:34:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:17,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-08 22:34:17,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-01-08 22:34:17,708 INFO L87 Difference]: Start difference. First operand 569 states and 776 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:18,530 INFO L93 Difference]: Finished difference Result 806 states and 1080 transitions. [2025-01-08 22:34:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-08 22:34:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 53 [2025-01-08 22:34:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:18,534 INFO L225 Difference]: With dead ends: 806 [2025-01-08 22:34:18,534 INFO L226 Difference]: Without dead ends: 725 [2025-01-08 22:34:18,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2025-01-08 22:34:18,535 INFO L435 NwaCegarLoop]: 154 mSDtfsCounter, 170 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:18,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 715 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:34:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2025-01-08 22:34:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 650. [2025-01-08 22:34:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 431 states have (on average 1.136890951276102) internal successors, (490), 432 states have internal predecessors, (490), 201 states have call successors, (201), 17 states have call predecessors, (201), 17 states have return successors, (201), 200 states have call predecessors, (201), 201 states have call successors, (201) [2025-01-08 22:34:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 892 transitions. [2025-01-08 22:34:18,676 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 892 transitions. Word has length 53 [2025-01-08 22:34:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:18,676 INFO L471 AbstractCegarLoop]: Abstraction has 650 states and 892 transitions. [2025-01-08 22:34:18,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 892 transitions. [2025-01-08 22:34:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-08 22:34:18,678 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:18,679 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:18,687 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 22:34:18,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:18,880 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:18,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1698519337, now seen corresponding path program 18 times [2025-01-08 22:34:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:18,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350237242] [2025-01-08 22:34:18,880 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:34:18,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:18,886 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 8 equivalence classes. [2025-01-08 22:34:18,903 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:34:18,903 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:34:18,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350237242] [2025-01-08 22:34:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350237242] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462974916] [2025-01-08 22:34:19,102 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:34:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:19,104 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 22:34:19,106 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 22:34:19,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 8 equivalence classes. [2025-01-08 22:34:19,526 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 53 of 53 statements. [2025-01-08 22:34:19,526 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-01-08 22:34:19,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:19,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-08 22:34:19,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:19,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:19,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462974916] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:19,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2025-01-08 22:34:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209054543] [2025-01-08 22:34:19,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:19,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-08 22:34:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:19,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-08 22:34:19,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:34:19,787 INFO L87 Difference]: Start difference. First operand 650 states and 892 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:20,779 INFO L93 Difference]: Finished difference Result 1512 states and 2065 transitions. [2025-01-08 22:34:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-01-08 22:34:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 53 [2025-01-08 22:34:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:20,785 INFO L225 Difference]: With dead ends: 1512 [2025-01-08 22:34:20,785 INFO L226 Difference]: Without dead ends: 1062 [2025-01-08 22:34:20,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1771, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:34:20,788 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 574 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:20,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 454 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:34:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2025-01-08 22:34:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 717. [2025-01-08 22:34:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 474 states have (on average 1.1350210970464134) internal successors, (538), 475 states have internal predecessors, (538), 225 states have call successors, (225), 17 states have call predecessors, (225), 17 states have return successors, (225), 224 states have call predecessors, (225), 225 states have call successors, (225) [2025-01-08 22:34:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 988 transitions. [2025-01-08 22:34:20,938 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 988 transitions. Word has length 53 [2025-01-08 22:34:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:20,938 INFO L471 AbstractCegarLoop]: Abstraction has 717 states and 988 transitions. [2025-01-08 22:34:20,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 988 transitions. [2025-01-08 22:34:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-08 22:34:20,939 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:20,940 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:20,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-08 22:34:21,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:21,140 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:21,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 976161269, now seen corresponding path program 19 times [2025-01-08 22:34:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:21,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846565169] [2025-01-08 22:34:21,141 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:34:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:21,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-08 22:34:21,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-08 22:34:21,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:21,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:34:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139449084] [2025-01-08 22:34:21,175 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-08 22:34:21,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:21,177 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 22:34:21,180 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 22:34:21,263 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-08 22:34:21,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-08 22:34:21,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:34:21,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:21,424 WARN L254 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-01-08 22:34:21,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:21,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:21,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:21,490 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:21,500 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:21,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,542 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:21,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,552 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:21,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,588 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:21,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,602 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:21,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:21,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:21,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:21,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:21,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-01-08 22:34:21,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:21,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-01-08 22:34:24,337 INFO L349 Elim1Store]: treesize reduction 308, result has 33.5 percent of original size [2025-01-08 22:34:24,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 208 [2025-01-08 22:34:24,599 INFO L349 Elim1Store]: treesize reduction 280, result has 35.6 percent of original size [2025-01-08 22:34:24,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 206 [2025-01-08 22:34:29,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:29,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 330 treesize of output 166 [2025-01-08 22:34:29,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:29,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 468 treesize of output 276 [2025-01-08 22:34:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-08 22:34:29,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:31,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846565169] [2025-01-08 22:34:31,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:34:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139449084] [2025-01-08 22:34:31,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139449084] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:31,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:34:31,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2025-01-08 22:34:31,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579662386] [2025-01-08 22:34:31,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:31,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-08 22:34:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:31,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-08 22:34:31,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:34:31,698 INFO L87 Difference]: Start difference. First operand 717 states and 988 transitions. Second operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:33,798 INFO L93 Difference]: Finished difference Result 761 states and 1041 transitions. [2025-01-08 22:34:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-08 22:34:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2025-01-08 22:34:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:33,803 INFO L225 Difference]: With dead ends: 761 [2025-01-08 22:34:33,803 INFO L226 Difference]: Without dead ends: 758 [2025-01-08 22:34:33,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=322, Invalid=2540, Unknown=0, NotChecked=0, Total=2862 [2025-01-08 22:34:33,805 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:33,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 319 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-01-08 22:34:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2025-01-08 22:34:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 735. [2025-01-08 22:34:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 487 states have (on average 1.135523613963039) internal successors, (553), 488 states have internal predecessors, (553), 229 states have call successors, (229), 18 states have call predecessors, (229), 18 states have return successors, (229), 228 states have call predecessors, (229), 229 states have call successors, (229) [2025-01-08 22:34:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1011 transitions. [2025-01-08 22:34:33,972 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1011 transitions. Word has length 54 [2025-01-08 22:34:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:33,973 INFO L471 AbstractCegarLoop]: Abstraction has 735 states and 1011 transitions. [2025-01-08 22:34:33,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1011 transitions. [2025-01-08 22:34:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-08 22:34:33,974 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:33,974 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:33,984 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 22:34:34,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:34,178 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:34,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 57897641, now seen corresponding path program 20 times [2025-01-08 22:34:34,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:34,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079321579] [2025-01-08 22:34:34,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:34,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-01-08 22:34:34,194 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:34:34,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:34,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:34,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:34,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079321579] [2025-01-08 22:34:34,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079321579] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:34,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061829588] [2025-01-08 22:34:34,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:34:34,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:34,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:34,458 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 22:34:34,461 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 22:34:34,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-01-08 22:34:34,600 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:34:34,600 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:34:34,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:34,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-08 22:34:34,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:34,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:34,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061829588] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:34,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:34,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-01-08 22:34:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608862112] [2025-01-08 22:34:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:34,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:34:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:34,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:34:34,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:34:34,960 INFO L87 Difference]: Start difference. First operand 735 states and 1011 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:35,762 INFO L93 Difference]: Finished difference Result 1017 states and 1370 transitions. [2025-01-08 22:34:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-08 22:34:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2025-01-08 22:34:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:35,767 INFO L225 Difference]: With dead ends: 1017 [2025-01-08 22:34:35,767 INFO L226 Difference]: Without dead ends: 924 [2025-01-08 22:34:35,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2025-01-08 22:34:35,768 INFO L435 NwaCegarLoop]: 178 mSDtfsCounter, 216 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:35,768 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 887 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-08 22:34:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2025-01-08 22:34:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 827. [2025-01-08 22:34:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 546 states have (on average 1.1373626373626373) internal successors, (621), 547 states have internal predecessors, (621), 261 states have call successors, (261), 19 states have call predecessors, (261), 19 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) [2025-01-08 22:34:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1143 transitions. [2025-01-08 22:34:35,926 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1143 transitions. Word has length 55 [2025-01-08 22:34:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:35,926 INFO L471 AbstractCegarLoop]: Abstraction has 827 states and 1143 transitions. [2025-01-08 22:34:35,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1143 transitions. [2025-01-08 22:34:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-08 22:34:35,928 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:35,928 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:35,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-01-08 22:34:36,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:36,129 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:36,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 196165796, now seen corresponding path program 21 times [2025-01-08 22:34:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:36,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267280635] [2025-01-08 22:34:36,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:36,141 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 9 equivalence classes. [2025-01-08 22:34:36,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:34:36,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-08 22:34:36,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:36,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267280635] [2025-01-08 22:34:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267280635] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965807047] [2025-01-08 22:34:36,437 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:34:36,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:36,440 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 22:34:36,442 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 22:34:36,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 9 equivalence classes. [2025-01-08 22:34:36,627 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 55 of 55 statements. [2025-01-08 22:34:36,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-08 22:34:36,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:36,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-08 22:34:36,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:36,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:36,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965807047] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:36,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:36,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-01-08 22:34:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248698666] [2025-01-08 22:34:36,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:36,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-08 22:34:36,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:36,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-08 22:34:36,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-01-08 22:34:36,951 INFO L87 Difference]: Start difference. First operand 827 states and 1143 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:38,230 INFO L93 Difference]: Finished difference Result 2018 states and 2765 transitions. [2025-01-08 22:34:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-08 22:34:38,230 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2025-01-08 22:34:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:38,237 INFO L225 Difference]: With dead ends: 2018 [2025-01-08 22:34:38,237 INFO L226 Difference]: Without dead ends: 1417 [2025-01-08 22:34:38,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 85 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=839, Invalid=2821, Unknown=0, NotChecked=0, Total=3660 [2025-01-08 22:34:38,240 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 992 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:38,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 522 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-08 22:34:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2025-01-08 22:34:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 905. [2025-01-08 22:34:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 596 states have (on average 1.1359060402684564) internal successors, (677), 597 states have internal predecessors, (677), 289 states have call successors, (289), 19 states have call predecessors, (289), 19 states have return successors, (289), 288 states have call predecessors, (289), 289 states have call successors, (289) [2025-01-08 22:34:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1255 transitions. [2025-01-08 22:34:38,452 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1255 transitions. Word has length 55 [2025-01-08 22:34:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:38,453 INFO L471 AbstractCegarLoop]: Abstraction has 905 states and 1255 transitions. [2025-01-08 22:34:38,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-08 22:34:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1255 transitions. [2025-01-08 22:34:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-08 22:34:38,455 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:38,455 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:38,465 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 22:34:38,656 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,SelfDestructingSolverStorable24 [2025-01-08 22:34:38,656 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:38,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1794764400, now seen corresponding path program 22 times [2025-01-08 22:34:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623459940] [2025-01-08 22:34:38,656 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:34:38,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:38,664 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-01-08 22:34:38,699 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-01-08 22:34:38,699 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:34:38,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-08 22:34:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889941256] [2025-01-08 22:34:38,701 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:34:38,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:38,703 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 22:34:38,705 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 22:34:38,800 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-01-08 22:34:39,186 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-01-08 22:34:39,186 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:34:39,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:39,191 WARN L254 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 144 conjuncts are in the unsatisfiable core [2025-01-08 22:34:39,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:39,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:39,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-08 22:34:39,258 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:39,265 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 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-08 22:34:39,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,309 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:39,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,321 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 1 case distinctions, treesize of input 26 treesize of output 28 [2025-01-08 22:34:39,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,369 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:39,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,391 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 3 case distinctions, treesize of input 33 treesize of output 38 [2025-01-08 22:34:39,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:39,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-01-08 22:34:39,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:39,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2025-01-08 22:34:39,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-01-08 22:34:39,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2025-01-08 22:34:39,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-01-08 22:34:39,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:39,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2025-01-08 22:34:42,391 INFO L349 Elim1Store]: treesize reduction 352, result has 33.5 percent of original size [2025-01-08 22:34:42,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 236 [2025-01-08 22:34:42,735 INFO L349 Elim1Store]: treesize reduction 320, result has 35.6 percent of original size [2025-01-08 22:34:42,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 234 [2025-01-08 22:34:49,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:49,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 406 treesize of output 202 [2025-01-08 22:34:49,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-08 22:34:49,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 737 treesize of output 373 [2025-01-08 22:34:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:50,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623459940] [2025-01-08 22:34:52,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-08 22:34:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889941256] [2025-01-08 22:34:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889941256] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:52,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-08 22:34:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2025-01-08 22:34:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541210056] [2025-01-08 22:34:52,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:52,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-08 22:34:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:52,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-08 22:34:52,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2025-01-08 22:34:52,609 INFO L87 Difference]: Start difference. First operand 905 states and 1255 transitions. Second operand has 30 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:34:54,801 INFO L93 Difference]: Finished difference Result 946 states and 1306 transitions. [2025-01-08 22:34:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-08 22:34:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2025-01-08 22:34:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:34:54,807 INFO L225 Difference]: With dead ends: 946 [2025-01-08 22:34:54,807 INFO L226 Difference]: Without dead ends: 931 [2025-01-08 22:34:54,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2025-01-08 22:34:54,808 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-01-08 22:34:54,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 432 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-01-08 22:34:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2025-01-08 22:34:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 921. [2025-01-08 22:34:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 607 states have (on average 1.1350906095551894) internal successors, (689), 608 states have internal predecessors, (689), 293 states have call successors, (293), 20 states have call predecessors, (293), 20 states have return successors, (293), 292 states have call predecessors, (293), 293 states have call successors, (293) [2025-01-08 22:34:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1275 transitions. [2025-01-08 22:34:55,016 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1275 transitions. Word has length 56 [2025-01-08 22:34:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:34:55,016 INFO L471 AbstractCegarLoop]: Abstraction has 921 states and 1275 transitions. [2025-01-08 22:34:55,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-08 22:34:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1275 transitions. [2025-01-08 22:34:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-01-08 22:34:55,018 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:34:55,018 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:34:55,027 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 22:34:55,222 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,SelfDestructingSolverStorable25 [2025-01-08 22:34:55,222 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:34:55,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:34:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -188286428, now seen corresponding path program 23 times [2025-01-08 22:34:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:34:55,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131611426] [2025-01-08 22:34:55,223 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:34:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:34:55,231 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 10 equivalence classes. [2025-01-08 22:34:55,282 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 57 of 57 statements. [2025-01-08 22:34:55,282 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:34:55,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:34:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131611426] [2025-01-08 22:34:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131611426] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:34:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473282391] [2025-01-08 22:34:55,557 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:34:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:34:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:34:55,560 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 22:34:55,562 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 22:34:55,665 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 10 equivalence classes. [2025-01-08 22:34:56,341 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 57 of 57 statements. [2025-01-08 22:34:56,342 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-08 22:34:56,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:34:56,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-08 22:34:56,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:34:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-08 22:34:56,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:34:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-08 22:34:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473282391] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:34:56,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:34:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2025-01-08 22:34:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892637218] [2025-01-08 22:34:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:34:56,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-08 22:34:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:34:56,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-08 22:34:56,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2025-01-08 22:34:56,647 INFO L87 Difference]: Start difference. First operand 921 states and 1275 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)