./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i --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/heap-manipulation/dll_of_dll-1.i -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 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 02:40:30,864 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 02:40:30,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 02:40:30,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 02:40:30,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 02:40:30,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 02:40:30,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 02:40:30,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 02:40:30,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 02:40:30,962 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 02:40:30,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 02:40:30,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 02:40:30,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 02:40:30,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 02:40:30,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 02:40:30,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 02:40:30,965 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:40:30,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:40:30,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 02:40:30,966 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:40:30,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:40:30,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:40:30,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:40:30,966 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 02:40:30,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 02:40:30,967 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 -> 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 [2025-01-09 02:40:31,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 02:40:31,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 02:40:31,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 02:40:31,189 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 02:40:31,189 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 02:40:31,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2025-01-09 02:40:32,372 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ea2d2c41e/977b88a66d3142808499341d24115ae3/FLAG67c59d0d0 [2025-01-09 02:40:32,611 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 02:40:32,612 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2025-01-09 02:40:32,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ea2d2c41e/977b88a66d3142808499341d24115ae3/FLAG67c59d0d0 [2025-01-09 02:40:32,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ea2d2c41e/977b88a66d3142808499341d24115ae3 [2025-01-09 02:40:32,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 02:40:32,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 02:40:32,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 02:40:32,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 02:40:32,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 02:40:32,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:40:32" (1/1) ... [2025-01-09 02:40:32,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12985199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:32, skipping insertion in model container [2025-01-09 02:40:32,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:40:32" (1/1) ... [2025-01-09 02:40:32,996 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 02:40:33,184 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/heap-manipulation/dll_of_dll-1.i[22634,22647] [2025-01-09 02:40:33,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:40:33,230 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 02:40:33,263 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/heap-manipulation/dll_of_dll-1.i[22634,22647] [2025-01-09 02:40:33,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:40:33,313 INFO L204 MainTranslator]: Completed translation [2025-01-09 02:40:33,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33 WrapperNode [2025-01-09 02:40:33,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 02:40:33,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 02:40:33,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 02:40:33,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 02:40:33,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,355 INFO L138 Inliner]: procedures = 140, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 199 [2025-01-09 02:40:33,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 02:40:33,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 02:40:33,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 02:40:33,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 02:40:33,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,394 INFO L175 MemorySlicer]: Split 48 memory accesses to 3 slices as follows [2, 40, 6]. 83 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 13 writes are split as follows [0, 11, 2]. [2025-01-09 02:40:33,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,401 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 02:40:33,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 02:40:33,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 02:40:33,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 02:40:33,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (1/1) ... [2025-01-09 02:40:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:40:33,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:40:33,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 02:40:33,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 02:40:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2025-01-09 02:40:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2025-01-09 02:40:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2025-01-09 02:40:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 02:40:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2025-01-09 02:40:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2025-01-09 02:40:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2025-01-09 02:40:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 02:40:33,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 02:40:33,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 02:40:33,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 02:40:33,545 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 02:40:33,547 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 02:40:33,799 INFO L? ?]: Removed 74 outVars from TransFormulas that were not future-live. [2025-01-09 02:40:33,799 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 02:40:33,807 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 02:40:33,807 INFO L312 CfgBuilder]: Removed 15 assume(true) statements. [2025-01-09 02:40:33,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:40:33 BoogieIcfgContainer [2025-01-09 02:40:33,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 02:40:33,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 02:40:33,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 02:40:33,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 02:40:33,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 02:40:32" (1/3) ... [2025-01-09 02:40:33,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da44d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:40:33, skipping insertion in model container [2025-01-09 02:40:33,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:40:33" (2/3) ... [2025-01-09 02:40:33,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da44d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:40:33, skipping insertion in model container [2025-01-09 02:40:33,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:40:33" (3/3) ... [2025-01-09 02:40:33,821 INFO L128 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2025-01-09 02:40:33,841 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 02:40:33,842 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll_of_dll-1.i that has 7 procedures, 127 locations, 1 initial locations, 24 loop locations, and 1 error locations. [2025-01-09 02:40:33,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 02:40:33,878 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;@6893c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 02:40:33,878 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 02:40:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 95 states have (on average 1.6210526315789473) internal successors, (154), 115 states have internal predecessors, (154), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2025-01-09 02:40:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 02:40:33,885 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:40:33,885 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:40:33,885 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:40:33,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:40:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash 929467139, now seen corresponding path program 1 times [2025-01-09 02:40:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:40:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940378533] [2025-01-09 02:40:33,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:33,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:40:33,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 02:40:33,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 02:40:33,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:33,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 02:40:34,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:40:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940378533] [2025-01-09 02:40:34,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940378533] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:40:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133918877] [2025-01-09 02:40:34,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:34,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:34,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:40:34,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:40:34,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 02:40:34,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 02:40:34,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 02:40:34,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:34,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:34,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 02:40:34,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:40:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 02:40:34,221 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 02:40:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133918877] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:40:34,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 02:40:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 02:40:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925157207] [2025-01-09 02:40:34,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:40:34,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 02:40:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:40:34,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 02:40:34,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 02:40:34,240 INFO L87 Difference]: Start difference. First operand has 127 states, 95 states have (on average 1.6210526315789473) internal successors, (154), 115 states have internal predecessors, (154), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 02:40:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:40:34,261 INFO L93 Difference]: Finished difference Result 249 states and 409 transitions. [2025-01-09 02:40:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 02:40:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2025-01-09 02:40:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:40:34,266 INFO L225 Difference]: With dead ends: 249 [2025-01-09 02:40:34,267 INFO L226 Difference]: Without dead ends: 119 [2025-01-09 02:40:34,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 02:40:34,271 INFO L435 NwaCegarLoop]: 155 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, 155 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 [2025-01-09 02:40:34,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:40:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-01-09 02:40:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2025-01-09 02:40:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 107 states have internal predecessors, (114), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-01-09 02:40:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2025-01-09 02:40:34,296 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 37 [2025-01-09 02:40:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:40:34,296 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2025-01-09 02:40:34,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 02:40:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2025-01-09 02:40:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 02:40:34,298 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:40:34,298 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:40:34,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 02:40:34,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-09 02:40:34,499 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:40:34,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:40:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 266694961, now seen corresponding path program 1 times [2025-01-09 02:40:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:40:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302341387] [2025-01-09 02:40:34,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:40:34,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 02:40:34,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 02:40:34,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:34,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:40:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:40:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302341387] [2025-01-09 02:40:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302341387] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:40:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188549044] [2025-01-09 02:40:35,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:40:35,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:40:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 02:40:35,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 02:40:35,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 02:40:35,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:35,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:35,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 02:40:35,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:40:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 02:40:35,599 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 02:40:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188549044] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:40:35,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 02:40:35,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2025-01-09 02:40:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136561617] [2025-01-09 02:40:35,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:40:35,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 02:40:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:40:35,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 02:40:35,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2025-01-09 02:40:35,602 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 02:40:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:40:35,715 INFO L93 Difference]: Finished difference Result 248 states and 322 transitions. [2025-01-09 02:40:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 02:40:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2025-01-09 02:40:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:40:35,717 INFO L225 Difference]: With dead ends: 248 [2025-01-09 02:40:35,718 INFO L226 Difference]: Without dead ends: 132 [2025-01-09 02:40:35,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2025-01-09 02:40:35,720 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:40:35,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 550 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:40:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-01-09 02:40:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2025-01-09 02:40:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.268041237113402) internal successors, (123), 115 states have internal predecessors, (123), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 02:40:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2025-01-09 02:40:35,730 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 38 [2025-01-09 02:40:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:40:35,730 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2025-01-09 02:40:35,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 02:40:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2025-01-09 02:40:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-01-09 02:40:35,732 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:40:35,733 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:40:35,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 02:40:35,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:35,938 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:40:35,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:40:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -959041839, now seen corresponding path program 1 times [2025-01-09 02:40:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:40:35,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848631286] [2025-01-09 02:40:35,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:40:35,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-01-09 02:40:36,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-01-09 02:40:36,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:36,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 72 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-01-09 02:40:36,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:40:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848631286] [2025-01-09 02:40:36,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848631286] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:40:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012386950] [2025-01-09 02:40:36,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:36,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:40:36,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:40:36,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 02:40:37,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-01-09 02:40:37,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-01-09 02:40:37,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:37,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:37,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-09 02:40:37,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:40:37,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 02:40:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 02:40:37,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:40:37,897 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 30 treesize of output 26 [2025-01-09 02:40:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-01-09 02:40:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012386950] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:40:37,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:40:37,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2025-01-09 02:40:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121358594] [2025-01-09 02:40:37,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:40:37,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 02:40:37,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:40:37,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 02:40:37,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2025-01-09 02:40:37,927 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 19 states, 18 states have (on average 4.555555555555555) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2025-01-09 02:40:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:40:38,652 INFO L93 Difference]: Finished difference Result 270 states and 340 transitions. [2025-01-09 02:40:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 02:40:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.555555555555555) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2025-01-09 02:40:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:40:38,654 INFO L225 Difference]: With dead ends: 270 [2025-01-09 02:40:38,654 INFO L226 Difference]: Without dead ends: 143 [2025-01-09 02:40:38,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2025-01-09 02:40:38,655 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 97 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 02:40:38,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1015 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 02:40:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-01-09 02:40:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2025-01-09 02:40:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 124 states have internal predecessors, (132), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (14), 11 states have call predecessors, (14), 13 states have call successors, (14) [2025-01-09 02:40:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2025-01-09 02:40:38,664 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 110 [2025-01-09 02:40:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:40:38,664 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2025-01-09 02:40:38,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.555555555555555) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2025-01-09 02:40:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2025-01-09 02:40:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-01-09 02:40:38,666 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:40:38,666 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:40:38,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 02:40:38,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:38,867 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:40:38,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:40:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1008739695, now seen corresponding path program 1 times [2025-01-09 02:40:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:40:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036651831] [2025-01-09 02:40:38,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:40:38,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-01-09 02:40:38,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-01-09 02:40:38,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:38,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-01-09 02:40:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:40:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036651831] [2025-01-09 02:40:39,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036651831] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:40:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750069652] [2025-01-09 02:40:39,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:40:39,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:40:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:40:39,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:40:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 02:40:39,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-01-09 02:40:39,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-01-09 02:40:39,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:40:39,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:40:39,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 108 conjuncts are in the unsatisfiable core [2025-01-09 02:40:39,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:40:39,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 02:40:44,440 INFO L349 Elim1Store]: treesize reduction 46, result has 24.6 percent of original size [2025-01-09 02:40:44,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 84 [2025-01-09 02:40:44,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2025-01-09 02:40:44,465 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-01-09 02:40:44,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 19 [2025-01-09 02:40:44,481 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 16 treesize of output 8 [2025-01-09 02:40:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-09 02:40:44,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:40:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750069652] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:40:45,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 02:40:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 34] total 41 [2025-01-09 02:40:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211542968] [2025-01-09 02:40:45,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 02:40:45,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-01-09 02:40:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:40:45,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-01-09 02:40:45,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1586, Unknown=2, NotChecked=0, Total=1722 [2025-01-09 02:40:45,487 INFO L87 Difference]: Start difference. First operand 142 states and 173 transitions. Second operand has 41 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 15 states have call successors, (19), 4 states have call predecessors, (19), 12 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2025-01-09 02:40:53,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 02:40:57,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 02:41:01,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 02:41:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:41:04,337 INFO L93 Difference]: Finished difference Result 362 states and 441 transitions. [2025-01-09 02:41:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-09 02:41:04,337 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 15 states have call successors, (19), 4 states have call predecessors, (19), 12 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) Word has length 110 [2025-01-09 02:41:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:41:04,339 INFO L225 Difference]: With dead ends: 362 [2025-01-09 02:41:04,339 INFO L226 Difference]: Without dead ends: 217 [2025-01-09 02:41:04,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=414, Invalid=4676, Unknown=22, NotChecked=0, Total=5112 [2025-01-09 02:41:04,341 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 251 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 85 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2025-01-09 02:41:04,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2409 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2765 Invalid, 29 Unknown, 0 Unchecked, 14.3s Time] [2025-01-09 02:41:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2025-01-09 02:41:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 180. [2025-01-09 02:41:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 156 states have internal predecessors, (171), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 02:41:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 215 transitions. [2025-01-09 02:41:04,362 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 215 transitions. Word has length 110 [2025-01-09 02:41:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:41:04,363 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 215 transitions. [2025-01-09 02:41:04,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 15 states have call successors, (19), 4 states have call predecessors, (19), 12 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2025-01-09 02:41:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 215 transitions. [2025-01-09 02:41:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-01-09 02:41:04,366 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:41:04,366 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:41:04,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 02:41:04,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:41:04,567 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:41:04,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:41:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -595333469, now seen corresponding path program 1 times [2025-01-09 02:41:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:41:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040279316] [2025-01-09 02:41:04,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:41:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:41:04,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-01-09 02:41:04,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-01-09 02:41:04,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:41:04,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:41:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 82 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-09 02:41:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:41:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040279316] [2025-01-09 02:41:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040279316] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:41:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952893092] [2025-01-09 02:41:10,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:41:10,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:41:10,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:41:10,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:41:10,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 02:41:10,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-01-09 02:41:10,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-01-09 02:41:10,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:41:10,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:41:10,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 193 conjuncts are in the unsatisfiable core [2025-01-09 02:41:10,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:41:11,044 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 [2025-01-09 02:41:11,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-01-09 02:41:11,511 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 [2025-01-09 02:41:11,616 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2025-01-09 02:41:11,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2025-01-09 02:41:11,728 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 35 treesize of output 27 [2025-01-09 02:41:11,733 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2025-01-09 02:41:11,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 16 [2025-01-09 02:41:11,737 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 5 treesize of output 3 [2025-01-09 02:41:11,832 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 5 treesize of output 3 [2025-01-09 02:41:12,037 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 [2025-01-09 02:41:12,261 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 81 treesize of output 45 [2025-01-09 02:41:12,283 INFO L349 Elim1Store]: treesize reduction 40, result has 24.5 percent of original size [2025-01-09 02:41:12,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 62 [2025-01-09 02:41:12,314 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 36 treesize of output 32 [2025-01-09 02:41:51,839 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 119 treesize of output 71