./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-sets/test_mutex.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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/ldv-sets/test_mutex.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 cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 14:30:30,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:30:30,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:30:30,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:30:30,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:30:30,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:30:30,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:30:30,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:30:30,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:30:30,372 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:30:30,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:30:30,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:30:30,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:30:30,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:30:30,372 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:30:30,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:30:30,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:30:30,373 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:30:30,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:30:30,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:30:30,374 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:30:30,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:30:30,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:30:30,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:30:30,375 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 -> cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 [2025-02-05 14:30:30,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:30:30,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:30:30,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:30:30,598 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:30:30,598 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:30:30,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex.i [2025-02-05 14:30:31,810 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fac361f49/59ddd1b590ea4153bedcea5f244a4ef3/FLAG4d0849ebe [2025-02-05 14:30:32,225 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:30:32,225 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex.i [2025-02-05 14:30:32,244 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fac361f49/59ddd1b590ea4153bedcea5f244a4ef3/FLAG4d0849ebe [2025-02-05 14:30:32,419 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fac361f49/59ddd1b590ea4153bedcea5f244a4ef3 [2025-02-05 14:30:32,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:30:32,440 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:30:32,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:30:32,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:30:32,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:30:32,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:32,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8573d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32, skipping insertion in model container [2025-02-05 14:30:32,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:32,515 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:30:32,838 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/ldv-sets/test_mutex.i[25842,25855] [2025-02-05 14:30:32,841 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/ldv-sets/test_mutex.i[25967,25980] [2025-02-05 14:30:32,841 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/ldv-sets/test_mutex.i[26082,26095] [2025-02-05 14:30:32,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:30:32,850 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:30:32,905 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/ldv-sets/test_mutex.i[25842,25855] [2025-02-05 14:30:32,906 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/ldv-sets/test_mutex.i[25967,25980] [2025-02-05 14:30:32,907 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/ldv-sets/test_mutex.i[26082,26095] [2025-02-05 14:30:32,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:30:32,946 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:30:32,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32 WrapperNode [2025-02-05 14:30:32,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:30:32,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:30:32,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:30:32,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:30:32,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:32,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:32,989 INFO L138 Inliner]: procedures = 139, calls = 57, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 137 [2025-02-05 14:30:32,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:30:32,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:30:32,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:30:32,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:30:33,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,011 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,056 INFO L175 MemorySlicer]: Split 22 memory accesses to 2 slices as follows [2, 20]. 91 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 7 writes are split as follows [0, 7]. [2025-02-05 14:30:33,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,069 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:30:33,086 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:30:33,086 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:30:33,086 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:30:33,087 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (1/1) ... [2025-02-05 14:30:33,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:30:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:30:33,145 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) [2025-02-05 14:30:33,161 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 [2025-02-05 14:30:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2025-02-05 14:30:33,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2025-02-05 14:30:33,179 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2025-02-05 14:30:33,179 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-05 14:30:33,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-05 14:30:33,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2025-02-05 14:30:33,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2025-02-05 14:30:33,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-05 14:30:33,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-05 14:30:33,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 14:30:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-05 14:30:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-05 14:30:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:30:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 14:30:33,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2025-02-05 14:30:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2025-02-05 14:30:33,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:30:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:30:33,349 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:30:33,358 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:30:33,626 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L663: havoc ldv_set_empty_#t~ret31#1; [2025-02-05 14:30:33,626 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L620: havoc ldv_list_empty_#t~mem10#1.base, ldv_list_empty_#t~mem10#1.offset; [2025-02-05 14:30:33,728 INFO L? ?]: Removed 73 outVars from TransFormulas that were not future-live. [2025-02-05 14:30:33,728 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:30:33,735 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:30:33,735 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:30:33,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:30:33 BoogieIcfgContainer [2025-02-05 14:30:33,736 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:30:33,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:30:33,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:30:33,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:30:33,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:30:32" (1/3) ... [2025-02-05 14:30:33,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b668bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:30:33, skipping insertion in model container [2025-02-05 14:30:33,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:30:32" (2/3) ... [2025-02-05 14:30:33,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b668bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:30:33, skipping insertion in model container [2025-02-05 14:30:33,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:30:33" (3/3) ... [2025-02-05 14:30:33,743 INFO L128 eAbstractionObserver]: Analyzing ICFG test_mutex.i [2025-02-05 14:30:33,756 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:30:33,757 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test_mutex.i that has 6 procedures, 68 locations, 1 initial locations, 2 loop locations, and 3 error locations. [2025-02-05 14:30:33,808 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:30:33,823 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;@67cf8f26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:30:33,823 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-05 14:30:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 51 states have internal predecessors, (60), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 14:30:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:30:33,837 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:30:33,838 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:30:33,839 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:30:33,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:30:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1577892343, now seen corresponding path program 1 times [2025-02-05 14:30:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:30:33,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578994279] [2025-02-05 14:30:33,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:30:33,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:30:34,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:30:34,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:34,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 14:30:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:30:34,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578994279] [2025-02-05 14:30:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578994279] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:30:34,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164595531] [2025-02-05 14:30:34,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:34,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:30:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:30:34,101 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) [2025-02-05 14:30:34,125 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 [2025-02-05 14:30:34,233 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:30:34,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:30:34,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:34,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:34,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 14:30:34,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:30:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:30:34,318 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:30:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164595531] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:30:34,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:30:34,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 14:30:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916988623] [2025-02-05 14:30:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:30:34,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 14:30:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:30:34,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 14:30:34,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:30:34,373 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 51 states have internal predecessors, (60), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:30:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:30:34,401 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2025-02-05 14:30:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 14:30:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-02-05 14:30:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:30:34,407 INFO L225 Difference]: With dead ends: 132 [2025-02-05 14:30:34,409 INFO L226 Difference]: Without dead ends: 63 [2025-02-05 14:30:34,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 14:30:34,415 INFO L435 NwaCegarLoop]: 78 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, 78 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 [2025-02-05 14:30:34,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:30:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-05 14:30:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2025-02-05 14:30:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 14:30:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2025-02-05 14:30:34,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 27 [2025-02-05 14:30:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:30:34,452 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2025-02-05 14:30:34,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-05 14:30:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2025-02-05 14:30:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:30:34,453 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:30:34,453 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:30:34,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 14:30:34,658 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 [2025-02-05 14:30:34,659 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:30:34,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:30:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1047387863, now seen corresponding path program 1 times [2025-02-05 14:30:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:30:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269422911] [2025-02-05 14:30:34,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:30:34,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 14:30:34,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:30:34,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:34,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:30:34,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:30:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269422911] [2025-02-05 14:30:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269422911] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:30:34,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:30:34,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:30:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164721034] [2025-02-05 14:30:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:30:34,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:30:34,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:30:34,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:30:34,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:30:34,836 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:30:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:30:34,854 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2025-02-05 14:30:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:30:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2025-02-05 14:30:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:30:34,856 INFO L225 Difference]: With dead ends: 69 [2025-02-05 14:30:34,856 INFO L226 Difference]: Without dead ends: 67 [2025-02-05 14:30:34,856 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 [2025-02-05 14:30:34,857 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 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 [2025-02-05 14:30:34,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:30:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-05 14:30:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-02-05 14:30:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2025-02-05 14:30:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2025-02-05 14:30:34,873 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 27 [2025-02-05 14:30:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:30:34,873 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2025-02-05 14:30:34,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:30:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2025-02-05 14:30:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 14:30:34,874 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:30:34,874 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:30:34,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 14:30:34,874 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:30:34,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:30:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1899112514, now seen corresponding path program 1 times [2025-02-05 14:30:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:30:34,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051110141] [2025-02-05 14:30:34,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:30:34,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 14:30:34,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:30:34,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:34,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:30:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:30:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051110141] [2025-02-05 14:30:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051110141] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:30:35,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:30:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 14:30:35,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329162524] [2025-02-05 14:30:35,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:30:35,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 14:30:35,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:30:35,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 14:30:35,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:30:35,283 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:30:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:30:35,816 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2025-02-05 14:30:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 14:30:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2025-02-05 14:30:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:30:35,828 INFO L225 Difference]: With dead ends: 185 [2025-02-05 14:30:35,828 INFO L226 Difference]: Without dead ends: 126 [2025-02-05 14:30:35,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:30:35,829 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:30:35,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 207 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:30:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-02-05 14:30:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2025-02-05 14:30:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 78 states have internal predecessors, (88), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2025-02-05 14:30:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2025-02-05 14:30:35,878 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 28 [2025-02-05 14:30:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:30:35,878 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2025-02-05 14:30:35,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 14:30:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2025-02-05 14:30:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-05 14:30:35,897 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:30:35,897 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1] [2025-02-05 14:30:35,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 14:30:35,897 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:30:35,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:30:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1606189501, now seen corresponding path program 1 times [2025-02-05 14:30:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:30:35,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023492439] [2025-02-05 14:30:35,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:35,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:30:35,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 14:30:35,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 14:30:35,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:35,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-02-05 14:30:36,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:30:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023492439] [2025-02-05 14:30:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023492439] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:30:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797056390] [2025-02-05 14:30:36,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:36,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:30:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:30:36,010 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) [2025-02-05 14:30:36,010 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 [2025-02-05 14:30:36,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 14:30:36,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 14:30:36,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:36,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:36,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-05 14:30:36,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:30:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:30:36,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 14:30:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797056390] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:30:36,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 14:30:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2025-02-05 14:30:36,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863656619] [2025-02-05 14:30:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:30:36,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:30:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:30:36,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:30:36,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:30:36,144 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-05 14:30:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:30:36,172 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2025-02-05 14:30:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:30:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2025-02-05 14:30:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:30:36,174 INFO L225 Difference]: With dead ends: 191 [2025-02-05 14:30:36,175 INFO L226 Difference]: Without dead ends: 112 [2025-02-05 14:30:36,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:30:36,176 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:30:36,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:30:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-02-05 14:30:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2025-02-05 14:30:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (27), 20 states have call predecessors, (27), 18 states have call successors, (27) [2025-02-05 14:30:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2025-02-05 14:30:36,205 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 67 [2025-02-05 14:30:36,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:30:36,205 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2025-02-05 14:30:36,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-05 14:30:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2025-02-05 14:30:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-05 14:30:36,206 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:30:36,206 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:30:36,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 14:30:36,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:30:36,412 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:30:36,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:30:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash 626081900, now seen corresponding path program 1 times [2025-02-05 14:30:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:30:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059065517] [2025-02-05 14:30:36,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:36,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:30:36,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 14:30:36,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 14:30:36,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:36,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:30:39,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:30:39,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059065517] [2025-02-05 14:30:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059065517] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:30:39,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311204733] [2025-02-05 14:30:39,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:30:39,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:30:39,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:30:39,238 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) [2025-02-05 14:30:39,248 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 [2025-02-05 14:30:39,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 14:30:39,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 14:30:39,384 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:30:39,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:30:39,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 141 conjuncts are in the unsatisfiable core [2025-02-05 14:30:39,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:30:39,603 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 [2025-02-05 14:30:40,244 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-05 14:30:40,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-05 14:30:40,652 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 [2025-02-05 14:30:40,799 INFO L349 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2025-02-05 14:30:40,799 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 1 case distinctions, treesize of input 71 treesize of output 26 [2025-02-05 14:30:40,913 INFO L349 Elim1Store]: treesize reduction 212, result has 24.8 percent of original size [2025-02-05 14:30:40,914 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 3 case distinctions, treesize of input 133 treesize of output 77 [2025-02-05 14:30:41,510 INFO L349 Elim1Store]: treesize reduction 378, result has 21.9 percent of original size [2025-02-05 14:30:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 233 treesize of output 120 [2025-02-05 14:30:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 14:30:43,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:30:44,019 INFO L349 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2025-02-05 14:30:44,019 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 4 case distinctions, treesize of input 311 treesize of output 298 [2025-02-05 14:30:44,071 INFO L349 Elim1Store]: treesize reduction 38, result has 56.8 percent of original size [2025-02-05 14:30:44,072 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 4 new quantified variables, introduced 7 case distinctions, treesize of input 165 treesize of output 190 [2025-02-05 14:30:44,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 14:30:44,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 404 treesize of output 364 [2025-02-05 14:30:44,119 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 102 treesize of output 94 [2025-02-05 14:30:44,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2025-02-05 14:30:44,291 INFO L349 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2025-02-05 14:30:44,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 195 [2025-02-05 14:30:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 14:30:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-05 14:30:44,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 4 [2025-02-05 14:30:44,341 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2025-02-05 14:30:44,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 4 [2025-02-05 14:30:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:30:44,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 13 [2025-02-05 14:30:44,435 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 14:30:44,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 13 [2025-02-05 14:30:44,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 14:30:44,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 150 [2025-02-05 14:30:44,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 14:30:44,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 511547 treesize of output 477441