./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:34:58,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:34:58,913 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:34:58,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:34:58,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:34:58,934 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:34:58,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:34:58,935 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:34:58,935 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:34:58,935 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:34:58,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:34:58,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:34:58,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:34:58,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:34:58,936 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:34:58,937 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:34:58,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:34:58,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:34:58,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:34:58,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:34:58,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:34:58,938 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:34:58,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:34:58,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:34:58,939 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:34:58,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:34:58,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:34:58,939 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2025-02-08 08:34:59,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:34:59,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:34:59,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:34:59,191 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:34:59,191 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:34:59,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2025-02-08 08:35:00,356 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ceea7c9e/1d96b881d0514707ba7a7e93b4b46371/FLAG8e64a1cb9 [2025-02-08 08:35:00,589 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:35:00,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2025-02-08 08:35:00,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ceea7c9e/1d96b881d0514707ba7a7e93b4b46371/FLAG8e64a1cb9 [2025-02-08 08:35:00,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ceea7c9e/1d96b881d0514707ba7a7e93b4b46371 [2025-02-08 08:35:00,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:35:00,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:35:00,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:00,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:35:00,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:35:00,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:00" (1/1) ... [2025-02-08 08:35:00,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5946f679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:00, skipping insertion in model container [2025-02-08 08:35:00,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:00" (1/1) ... [2025-02-08 08:35:00,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:35:01,074 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:35:01,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:01,082 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:35:01,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:01,115 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:35:01,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01 WrapperNode [2025-02-08 08:35:01,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:01,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:01,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:35:01,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:35:01,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,143 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 300 [2025-02-08 08:35:01,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:01,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:35:01,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:35:01,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:35:01,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,166 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:35:01,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,176 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:35:01,181 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:35:01,181 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:35:01,181 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:35:01,182 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (1/1) ... [2025-02-08 08:35:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:35:01,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:01,211 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) [2025-02-08 08:35:01,214 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 [2025-02-08 08:35:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:35:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:35:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:35:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:35:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:35:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:35:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:35:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:35:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:35:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:35:01,234 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:35:01,326 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:35:01,328 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:35:01,455 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-3: #t~ite5#1 := #t~ret4#1; [2025-02-08 08:35:01,456 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret4#1 && #t~ret4#1 <= 2147483647; [2025-02-08 08:35:01,456 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:01,456 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:01,456 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L63-7: #t~ret4#1 := minus_#res#1; [2025-02-08 08:35:01,539 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L85-3: #t~ite10#1 := #t~ret9#1; [2025-02-08 08:35:01,539 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L85-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret9#1 && #t~ret9#1 <= 2147483647; [2025-02-08 08:35:01,539 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L85-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:01,539 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L85-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:01,540 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L85-7: #t~ret9#1 := minus_#res#1; [2025-02-08 08:35:01,608 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L107-3: #t~ite15#1 := #t~ret14#1; [2025-02-08 08:35:01,608 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L107-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret14#1 && #t~ret14#1 <= 2147483647; [2025-02-08 08:35:01,608 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L107-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:01,609 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L107-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:01,609 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L107-7: #t~ret14#1 := minus_#res#1; [2025-02-08 08:35:01,729 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:35:01,729 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:35:01,980 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:35:01,981 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:35:01,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:01 BoogieIcfgContainer [2025-02-08 08:35:01,981 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:35:01,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:35:01,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:35:01,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:35:01,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:35:00" (1/3) ... [2025-02-08 08:35:01,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b68ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:01, skipping insertion in model container [2025-02-08 08:35:01,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:01" (2/3) ... [2025-02-08 08:35:01,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b68ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:01, skipping insertion in model container [2025-02-08 08:35:01,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:01" (3/3) ... [2025-02-08 08:35:01,988 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2025-02-08 08:35:01,998 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:35:01,999 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-subst.wvr.c that has 4 procedures, 50 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-08 08:35:01,999 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:35:02,046 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:35:02,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 56 transitions, 133 flow [2025-02-08 08:35:02,092 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2025-02-08 08:35:02,093 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:35:02,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 53 events. 7/53 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2025-02-08 08:35:02,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 56 transitions, 133 flow [2025-02-08 08:35:02,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 122 flow [2025-02-08 08:35:02,103 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:35:02,111 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=None, 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;@15b7bcf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:35:02,111 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-08 08:35:02,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:35:02,114 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:35:02,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:35:02,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:02,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:02,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:02,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 791729, now seen corresponding path program 1 times [2025-02-08 08:35:02,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996004550] [2025-02-08 08:35:02,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:02,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:02,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:02,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:02,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:02,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996004550] [2025-02-08 08:35:02,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996004550] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:02,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:02,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:35:02,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121566626] [2025-02-08 08:35:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:02,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:35:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:02,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:35:02,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:35:02,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:02,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:02,914 INFO L124 PetriNetUnfolderBase]: 2970/4493 cut-off events. [2025-02-08 08:35:02,914 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2025-02-08 08:35:02,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8932 conditions, 4493 events. 2970/4493 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22351 event pairs, 2534 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 8420. Up to 4213 conditions per place. [2025-02-08 08:35:02,943 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 36 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2025-02-08 08:35:02,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 186 flow [2025-02-08 08:35:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-02-08 08:35:02,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-02-08 08:35:02,957 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 122 flow. Second operand 3 states and 79 transitions. [2025-02-08 08:35:02,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 186 flow [2025-02-08 08:35:02,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 174 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:35:02,970 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 102 flow [2025-02-08 08:35:02,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2025-02-08 08:35:02,976 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2025-02-08 08:35:02,976 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 102 flow [2025-02-08 08:35:02,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:02,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:02,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:35:02,977 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:02,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash 791730, now seen corresponding path program 1 times [2025-02-08 08:35:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:02,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640338270] [2025-02-08 08:35:02,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:02,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:03,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:03,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:03,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:03,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640338270] [2025-02-08 08:35:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640338270] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:03,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:03,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:35:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801552772] [2025-02-08 08:35:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:03,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:03,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:03,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:03,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:03,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:03,591 INFO L124 PetriNetUnfolderBase]: 2970/4495 cut-off events. [2025-02-08 08:35:03,591 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2025-02-08 08:35:03,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 4495 events. 2970/4495 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22335 event pairs, 2534 based on Foata normal form. 1/3487 useless extension candidates. Maximal degree in co-relation 8772. Up to 4217 conditions per place. [2025-02-08 08:35:03,617 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 39 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2025-02-08 08:35:03,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 188 flow [2025-02-08 08:35:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-02-08 08:35:03,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-02-08 08:35:03,621 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 102 flow. Second operand 3 states and 79 transitions. [2025-02-08 08:35:03,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 188 flow [2025-02-08 08:35:03,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:03,622 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 112 flow [2025-02-08 08:35:03,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2025-02-08 08:35:03,624 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -6 predicate places. [2025-02-08 08:35:03,624 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 112 flow [2025-02-08 08:35:03,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:03,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:03,625 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:35:03,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:35:03,625 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:03,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash 760877382, now seen corresponding path program 1 times [2025-02-08 08:35:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018377252] [2025-02-08 08:35:03,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:03,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:03,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:03,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:03,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:03,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018377252] [2025-02-08 08:35:03,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018377252] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:03,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261250921] [2025-02-08 08:35:03,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:03,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:03,819 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) [2025-02-08 08:35:03,821 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 [2025-02-08 08:35:03,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:03,880 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:03,880 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:03,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:03,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:35:03,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:03,915 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 [2025-02-08 08:35:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:03,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261250921] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:04,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-08 08:35:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849527951] [2025-02-08 08:35:04,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:04,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:35:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:04,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:35:04,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:35:04,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:04,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 112 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:04,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:04,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:04,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:04,448 INFO L124 PetriNetUnfolderBase]: 2972/4501 cut-off events. [2025-02-08 08:35:04,449 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2025-02-08 08:35:04,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8812 conditions, 4501 events. 2972/4501 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22347 event pairs, 2534 based on Foata normal form. 0/3492 useless extension candidates. Maximal degree in co-relation 8799. Up to 4219 conditions per place. [2025-02-08 08:35:04,464 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 41 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2025-02-08 08:35:04,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 228 flow [2025-02-08 08:35:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-02-08 08:35:04,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2025-02-08 08:35:04,468 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 112 flow. Second operand 5 states and 109 transitions. [2025-02-08 08:35:04,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 228 flow [2025-02-08 08:35:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:35:04,469 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 152 flow [2025-02-08 08:35:04,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2025-02-08 08:35:04,470 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2025-02-08 08:35:04,470 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 152 flow [2025-02-08 08:35:04,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:04,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:04,470 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2025-02-08 08:35:04,478 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 [2025-02-08 08:35:04,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:04,676 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:04,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash -449787026, now seen corresponding path program 2 times [2025-02-08 08:35:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435375774] [2025-02-08 08:35:04,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:04,684 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-08 08:35:04,693 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:04,693 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:04,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:04,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435375774] [2025-02-08 08:35:04,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435375774] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301642822] [2025-02-08 08:35:04,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:04,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:04,790 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) [2025-02-08 08:35:04,792 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 [2025-02-08 08:35:04,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-02-08 08:35:04,853 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:04,853 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:04,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:04,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:35:04,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:04,905 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:04,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301642822] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:04,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:04,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-08 08:35:04,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808795866] [2025-02-08 08:35:04,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:04,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:35:04,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:04,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:35:04,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:35:04,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2025-02-08 08:35:04,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:04,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:04,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2025-02-08 08:35:04,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:05,204 INFO L124 PetriNetUnfolderBase]: 2971/4498 cut-off events. [2025-02-08 08:35:05,204 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2025-02-08 08:35:05,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8816 conditions, 4498 events. 2971/4498 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22322 event pairs, 2534 based on Foata normal form. 1/3491 useless extension candidates. Maximal degree in co-relation 8789. Up to 4215 conditions per place. [2025-02-08 08:35:05,226 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 37 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2025-02-08 08:35:05,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 230 flow [2025-02-08 08:35:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:35:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:35:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2025-02-08 08:35:05,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2025-02-08 08:35:05,229 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 152 flow. Second operand 6 states and 123 transitions. [2025-02-08 08:35:05,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 230 flow [2025-02-08 08:35:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 210 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:05,230 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 136 flow [2025-02-08 08:35:05,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2025-02-08 08:35:05,230 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2025-02-08 08:35:05,230 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 136 flow [2025-02-08 08:35:05,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:05,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:05,231 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:05,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:35:05,431 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 [2025-02-08 08:35:05,431 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:05,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -345323172, now seen corresponding path program 1 times [2025-02-08 08:35:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469701497] [2025-02-08 08:35:05,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:05,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:05,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:35:05,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:05,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:05,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:05,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:05,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469701497] [2025-02-08 08:35:05,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469701497] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:05,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:05,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:05,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628629881] [2025-02-08 08:35:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:05,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:05,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:05,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:05,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:05,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 56 [2025-02-08 08:35:05,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:05,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:05,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 56 [2025-02-08 08:35:05,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:05,755 INFO L124 PetriNetUnfolderBase]: 2971/4360 cut-off events. [2025-02-08 08:35:05,755 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-02-08 08:35:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8677 conditions, 4360 events. 2971/4360 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20118 event pairs, 2534 based on Foata normal form. 0/3490 useless extension candidates. Maximal degree in co-relation 8642. Up to 4214 conditions per place. [2025-02-08 08:35:05,769 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2025-02-08 08:35:05,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 214 flow [2025-02-08 08:35:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2025-02-08 08:35:05,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34375 [2025-02-08 08:35:05,772 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 136 flow. Second operand 4 states and 77 transitions. [2025-02-08 08:35:05,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 214 flow [2025-02-08 08:35:05,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 196 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-02-08 08:35:05,775 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 120 flow [2025-02-08 08:35:05,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2025-02-08 08:35:05,775 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2025-02-08 08:35:05,775 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 120 flow [2025-02-08 08:35:05,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:05,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:05,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:05,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:35:05,777 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:05,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -345323171, now seen corresponding path program 1 times [2025-02-08 08:35:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:05,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526079862] [2025-02-08 08:35:05,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:05,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:35:05,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:05,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:05,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526079862] [2025-02-08 08:35:05,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526079862] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175886843] [2025-02-08 08:35:05,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:05,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:05,849 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) [2025-02-08 08:35:05,851 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 [2025-02-08 08:35:05,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:35:05,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:05,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:05,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:05,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:35:05,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:05,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:05,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175886843] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:05,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:05,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-02-08 08:35:05,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172941399] [2025-02-08 08:35:05,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:05,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:35:05,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:05,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:35:05,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:35:05,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2025-02-08 08:35:05,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:05,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:05,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2025-02-08 08:35:05,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:06,215 INFO L124 PetriNetUnfolderBase]: 2969/4358 cut-off events. [2025-02-08 08:35:06,216 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2025-02-08 08:35:06,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8664 conditions, 4358 events. 2969/4358 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20037 event pairs, 2534 based on Foata normal form. 2/3490 useless extension candidates. Maximal degree in co-relation 8634. Up to 4214 conditions per place. [2025-02-08 08:35:06,231 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2025-02-08 08:35:06,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 202 flow [2025-02-08 08:35:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-02-08 08:35:06,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2025-02-08 08:35:06,232 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 120 flow. Second operand 5 states and 109 transitions. [2025-02-08 08:35:06,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 202 flow [2025-02-08 08:35:06,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:06,233 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 115 flow [2025-02-08 08:35:06,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2025-02-08 08:35:06,234 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2025-02-08 08:35:06,234 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 115 flow [2025-02-08 08:35:06,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:06,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:06,234 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:06,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:35:06,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:06,435 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:06,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 126365573, now seen corresponding path program 2 times [2025-02-08 08:35:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:06,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394684056] [2025-02-08 08:35:06,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:06,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:06,444 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 08:35:06,453 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 13 statements. [2025-02-08 08:35:06,453 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:35:06,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:35:06,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394684056] [2025-02-08 08:35:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394684056] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:06,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:06,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728963875] [2025-02-08 08:35:06,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:06,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:35:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:06,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:35:06,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:35:06,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:06,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:06,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:06,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:06,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:06,982 INFO L124 PetriNetUnfolderBase]: 5937/8503 cut-off events. [2025-02-08 08:35:06,983 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-08 08:35:06,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 8503 events. 5937/8503 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 43552 event pairs, 2854 based on Foata normal form. 0/6617 useless extension candidates. Maximal degree in co-relation 17065. Up to 4712 conditions per place. [2025-02-08 08:35:07,006 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 69 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2025-02-08 08:35:07,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 330 flow [2025-02-08 08:35:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2025-02-08 08:35:07,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2025-02-08 08:35:07,008 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 115 flow. Second operand 5 states and 132 transitions. [2025-02-08 08:35:07,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 330 flow [2025-02-08 08:35:07,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 322 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:07,010 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 123 flow [2025-02-08 08:35:07,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2025-02-08 08:35:07,012 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2025-02-08 08:35:07,012 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 123 flow [2025-02-08 08:35:07,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:07,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:07,012 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:07,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:35:07,013 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:07,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 835813140, now seen corresponding path program 1 times [2025-02-08 08:35:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:07,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173327498] [2025-02-08 08:35:07,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:07,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:35:07,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:35:07,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:07,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:07,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173327498] [2025-02-08 08:35:07,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173327498] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805945709] [2025-02-08 08:35:07,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:07,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:07,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:07,174 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) [2025-02-08 08:35:07,176 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 [2025-02-08 08:35:07,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:35:07,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:35:07,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:07,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:07,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:35:07,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:07,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:07,421 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 22 treesize of output 18 [2025-02-08 08:35:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:07,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805945709] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:07,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:07,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2025-02-08 08:35:07,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148694168] [2025-02-08 08:35:07,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:07,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:35:07,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:07,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:35:07,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:35:07,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:07,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 123 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:07,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:07,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:09,025 INFO L124 PetriNetUnfolderBase]: 15995/22745 cut-off events. [2025-02-08 08:35:09,026 INFO L125 PetriNetUnfolderBase]: For 2424/2825 co-relation queries the response was YES. [2025-02-08 08:35:09,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47465 conditions, 22745 events. 15995/22745 cut-off events. For 2424/2825 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 128354 event pairs, 5535 based on Foata normal form. 0/17595 useless extension candidates. Maximal degree in co-relation 47433. Up to 8900 conditions per place. [2025-02-08 08:35:09,135 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 99 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2025-02-08 08:35:09,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 109 transitions, 491 flow [2025-02-08 08:35:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:35:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:35:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2025-02-08 08:35:09,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4486607142857143 [2025-02-08 08:35:09,138 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 123 flow. Second operand 8 states and 201 transitions. [2025-02-08 08:35:09,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 109 transitions, 491 flow [2025-02-08 08:35:09,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 109 transitions, 481 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:09,140 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 145 flow [2025-02-08 08:35:09,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2025-02-08 08:35:09,141 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2025-02-08 08:35:09,141 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 145 flow [2025-02-08 08:35:09,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:09,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:09,141 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:09,147 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 [2025-02-08 08:35:09,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-08 08:35:09,342 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:09,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2128726932, now seen corresponding path program 1 times [2025-02-08 08:35:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:09,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516841458] [2025-02-08 08:35:09,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:09,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:35:09,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:35:09,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:09,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516841458] [2025-02-08 08:35:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516841458] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469621397] [2025-02-08 08:35:09,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:09,597 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) [2025-02-08 08:35:09,603 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 [2025-02-08 08:35:09,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:35:09,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:35:09,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:09,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:09,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:35:09,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:09,740 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 8 treesize of output 1 [2025-02-08 08:35:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:09,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469621397] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:10,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:10,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-02-08 08:35:10,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135846444] [2025-02-08 08:35:10,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:10,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:35:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:10,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:35:10,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:35:10,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 56 [2025-02-08 08:35:10,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 145 flow. Second operand has 23 states, 23 states have (on average 13.08695652173913) internal successors, (301), 23 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:10,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:10,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 56 [2025-02-08 08:35:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:12,619 INFO L124 PetriNetUnfolderBase]: 30605/43477 cut-off events. [2025-02-08 08:35:12,619 INFO L125 PetriNetUnfolderBase]: For 4947/4947 co-relation queries the response was YES. [2025-02-08 08:35:12,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93441 conditions, 43477 events. 30605/43477 cut-off events. For 4947/4947 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 267862 event pairs, 8118 based on Foata normal form. 0/33623 useless extension candidates. Maximal degree in co-relation 93405. Up to 12896 conditions per place. [2025-02-08 08:35:12,844 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 139 selfloop transitions, 8 changer transitions 0/150 dead transitions. [2025-02-08 08:35:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 150 transitions, 704 flow [2025-02-08 08:35:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:35:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:35:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2025-02-08 08:35:12,846 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-02-08 08:35:12,846 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 145 flow. Second operand 9 states and 240 transitions. [2025-02-08 08:35:12,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 150 transitions, 704 flow [2025-02-08 08:35:12,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 150 transitions, 697 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:12,850 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 172 flow [2025-02-08 08:35:12,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2025-02-08 08:35:12,851 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2025-02-08 08:35:12,851 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 172 flow [2025-02-08 08:35:12,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.08695652173913) internal successors, (301), 23 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:12,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:12,851 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:12,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:35:13,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:13,052 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:13,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1636909429, now seen corresponding path program 1 times [2025-02-08 08:35:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:13,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143443851] [2025-02-08 08:35:13,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:13,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:35:13,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:35:13,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:13,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:13,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143443851] [2025-02-08 08:35:13,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143443851] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:13,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230630184] [2025-02-08 08:35:13,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:13,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:13,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:35:13,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:35:13,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:35:13,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:13,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:13,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:35:13,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:13,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:13,554 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 22 treesize of output 18 [2025-02-08 08:35:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230630184] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:13,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:13,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-02-08 08:35:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255495353] [2025-02-08 08:35:13,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:13,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:35:13,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:13,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:35:13,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:35:13,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:13,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 172 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:13,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:13,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:13,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:19,422 INFO L124 PetriNetUnfolderBase]: 80305/113669 cut-off events. [2025-02-08 08:35:19,422 INFO L125 PetriNetUnfolderBase]: For 37683/38519 co-relation queries the response was YES. [2025-02-08 08:35:19,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249993 conditions, 113669 events. 80305/113669 cut-off events. For 37683/38519 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 755394 event pairs, 30579 based on Foata normal form. 0/86669 useless extension candidates. Maximal degree in co-relation 249954. Up to 46756 conditions per place. [2025-02-08 08:35:19,896 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 107 selfloop transitions, 7 changer transitions 0/117 dead transitions. [2025-02-08 08:35:19,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 618 flow [2025-02-08 08:35:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:35:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:35:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2025-02-08 08:35:19,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43973214285714285 [2025-02-08 08:35:19,898 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 172 flow. Second operand 8 states and 197 transitions. [2025-02-08 08:35:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 618 flow [2025-02-08 08:35:19,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 117 transitions, 593 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:35:19,909 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 187 flow [2025-02-08 08:35:19,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=187, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2025-02-08 08:35:19,909 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2025-02-08 08:35:19,909 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 187 flow [2025-02-08 08:35:19,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:19,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:19,910 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:19,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:35:20,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:35:20,110 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:20,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash -707438956, now seen corresponding path program 1 times [2025-02-08 08:35:20,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:20,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459538800] [2025-02-08 08:35:20,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:20,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:20,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:35:20,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:35:20,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:20,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:20,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459538800] [2025-02-08 08:35:20,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459538800] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:20,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781372208] [2025-02-08 08:35:20,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:20,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:35:20,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:35:20,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:35:20,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:20,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:20,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:35:20,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:20,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:20,662 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 24 treesize of output 20 [2025-02-08 08:35:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:20,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781372208] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:20,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:20,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-02-08 08:35:20,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507449848] [2025-02-08 08:35:20,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:20,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 08:35:20,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:20,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 08:35:20,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2025-02-08 08:35:20,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2025-02-08 08:35:20,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 187 flow. Second operand has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:20,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:20,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2025-02-08 08:35:20,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:29,587 INFO L124 PetriNetUnfolderBase]: 104871/148283 cut-off events. [2025-02-08 08:35:29,587 INFO L125 PetriNetUnfolderBase]: For 46374/47622 co-relation queries the response was YES. [2025-02-08 08:35:29,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334192 conditions, 148283 events. 104871/148283 cut-off events. For 46374/47622 co-relation queries the response was YES. Maximal size of possible extension queue 2662. Compared 1025336 event pairs, 29085 based on Foata normal form. 1422/116017 useless extension candidates. Maximal degree in co-relation 334150. Up to 44454 conditions per place. [2025-02-08 08:35:30,280 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 145 selfloop transitions, 8 changer transitions 0/156 dead transitions. [2025-02-08 08:35:30,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 811 flow [2025-02-08 08:35:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:35:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:35:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2025-02-08 08:35:30,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2025-02-08 08:35:30,282 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 187 flow. Second operand 9 states and 242 transitions. [2025-02-08 08:35:30,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 811 flow [2025-02-08 08:35:30,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 156 transitions, 804 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:30,596 INFO L231 Difference]: Finished difference. Result has 74 places, 52 transitions, 206 flow [2025-02-08 08:35:30,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2025-02-08 08:35:30,597 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2025-02-08 08:35:30,597 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 206 flow [2025-02-08 08:35:30,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:30,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:30,597 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-02-08 08:35:30,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:30,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:30,798 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-08 08:35:30,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1606757836, now seen corresponding path program 2 times [2025-02-08 08:35:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:30,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614074356] [2025-02-08 08:35:30,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:30,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:35:30,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:30,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:30,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:35:31,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:31,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614074356] [2025-02-08 08:35:31,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614074356] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:31,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399306422] [2025-02-08 08:35:31,160 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:31,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:31,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:31,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:31,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:35:31,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:35:31,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:31,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:31,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:31,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:35:31,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:35:31,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399306422] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:31,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2025-02-08 08:35:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754382981] [2025-02-08 08:35:31,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:31,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:35:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:31,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:35:31,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:35:31,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2025-02-08 08:35:31,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:31,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:31,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2025-02-08 08:35:31,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand